Adding upstream version 2.4.57.upstream/2.4.57

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 5675 insertions, 0 deletions

diff --git a/server/core.c b/server/core.c
new file mode 100644
index 0000000..e1493fd
--- /dev/null
+++ b/server/core.c
@@ -0,0 +1,5675 @@
+/* Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License.  You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#include "apr.h"
+#include "apr_strings.h"
+#include "apr_lib.h"
+#include "apr_fnmatch.h"
+#include "apr_hash.h"
+#include "apr_thread_proc.h"    /* for RLIMIT stuff */
+#include "apr_random.h"
+
+#include "apr_version.h"
+#if APR_MAJOR_VERSION < 2
+#include "apu_version.h"
+#endif
+
+#define APR_WANT_IOVEC
+#define APR_WANT_STRFUNC
+#define APR_WANT_MEMFUNC
+#include "apr_want.h"
+
+#include "ap_config.h"
+#include "httpd.h"
+#include "http_config.h"
+#include "http_core.h"
+#include "http_protocol.h" /* For index_of_response().  Grump. */
+#include "http_request.h"
+#include "http_ssl.h"
+#include "http_vhost.h"
+#include "http_main.h"     /* For the default_handler below... */
+#include "http_log.h"
+#include "util_md5.h"
+#include "http_connection.h"
+#include "apr_buckets.h"
+#include "util_filter.h"
+#include "util_ebcdic.h"
+#include "util_mutex.h"
+#include "util_time.h"
+#include "mpm_common.h"
+#include "scoreboard.h"
+#include "mod_core.h"
+#include "mod_proxy.h"
+#include "ap_listen.h"
+#include "ap_regex.h"
+
+#include "mod_so.h" /* for ap_find_loaded_module_symbol */
+
+#if defined(RLIMIT_CPU) || defined (RLIMIT_DATA) || defined (RLIMIT_VMEM) || defined(RLIMIT_AS) || defined (RLIMIT_NPROC)
+#include "unixd.h"
+#endif
+#if APR_HAVE_UNISTD_H
+#include <unistd.h>
+#endif
+
+/* LimitRequestBody handling */
+#define AP_LIMIT_REQ_BODY_UNSET         ((apr_off_t) -1)
+#define AP_DEFAULT_LIMIT_REQ_BODY       ((apr_off_t) 1<<30) /* 1GB */
+
+/* LimitXMLRequestBody handling */
+#define AP_LIMIT_UNSET                  ((long) -1)
+#define AP_DEFAULT_LIMIT_XML_BODY       ((apr_size_t)1000000)
+/* Hard limit for ap_escape_html2() */
+#define AP_MAX_LIMIT_XML_BODY           ((apr_size_t)(APR_SIZE_MAX / 6 - 1))
+
+#define AP_MIN_SENDFILE_BYTES           (256)
+
+/* maximum include nesting level */
+#ifndef AP_MAX_INCLUDE_DEPTH
+#define AP_MAX_INCLUDE_DEPTH            (128)
+#endif
+
+/* valid in core-conf, but not in runtime r->used_path_info */
+#define AP_ACCEPT_PATHINFO_UNSET 3
+
+#define AP_CONTENT_MD5_OFF   0
+#define AP_CONTENT_MD5_ON    1
+#define AP_CONTENT_MD5_UNSET 2
+
+#define AP_FLUSH_MAX_THRESHOLD 65535
+#define AP_FLUSH_MAX_PIPELINED 4
+
+APR_HOOK_STRUCT(
+    APR_HOOK_LINK(get_mgmt_items)
+    APR_HOOK_LINK(insert_network_bucket)
+)
+
+AP_IMPLEMENT_HOOK_RUN_ALL(int, get_mgmt_items,
+                          (apr_pool_t *p, const char *val, apr_hash_t *ht),
+                          (p, val, ht), OK, DECLINED)
+
+AP_IMPLEMENT_HOOK_RUN_FIRST(apr_status_t, insert_network_bucket,
+                            (conn_rec *c, apr_bucket_brigade *bb,
+                             apr_socket_t *socket),
+                            (c, bb, socket), AP_DECLINED)
+
+/* Server core module... This module provides support for really basic
+ * server operations, including options and commands which control the
+ * operation of other modules.  Consider this the bureaucracy module.
+ *
+ * The core module also defines handlers, etc., to handle just enough
+ * to allow a server with the core module ONLY to actually serve documents.
+ *
+ * This file could almost be mod_core.c, except for the stuff which affects
+ * the http_conf_globals.
+ */
+
+/* we know core's module_index is 0 */
+#undef APLOG_MODULE_INDEX
+#define APLOG_MODULE_INDEX AP_CORE_MODULE_INDEX
+
+/* Handles for core filters */
+AP_DECLARE_DATA ap_filter_rec_t *ap_subreq_core_filter_handle;
+AP_DECLARE_DATA ap_filter_rec_t *ap_core_output_filter_handle;
+AP_DECLARE_DATA ap_filter_rec_t *ap_content_length_filter_handle;
+AP_DECLARE_DATA ap_filter_rec_t *ap_core_input_filter_handle;
+
+/* Provide ap_document_root_check storage and default value = true */
+AP_DECLARE_DATA int ap_document_root_check = 1;
+
+/* magic pointer for ErrorDocument xxx "default" */
+static char errordocument_default;
+
+/* Global state allocated out of pconf: variables here MUST be
+ * cleared/reset in reset_config(), a pconf cleanup, to avoid the
+ * variable getting reused after the pool is cleared. */
+static apr_array_header_t *saved_server_config_defines = NULL;
+static apr_table_t *server_config_defined_vars = NULL;
+AP_DECLARE_DATA const char *ap_runtime_dir = NULL;
+
+AP_DECLARE_DATA int ap_main_state = AP_SQ_MS_INITIAL_STARTUP;
+AP_DECLARE_DATA int ap_run_mode = AP_SQ_RM_UNKNOWN;
+AP_DECLARE_DATA int ap_config_generation = 0;
+
+static void *create_core_dir_config(apr_pool_t *a, char *dir)
+{
+    core_dir_config *conf;
+
+    conf = (core_dir_config *)apr_pcalloc(a, sizeof(core_dir_config));
+
+    /* conf->r and conf->d[_*] are initialized by dirsection() or left NULL */
+
+    conf->opts = dir ? OPT_UNSET : OPT_UNSET|OPT_SYM_LINKS;
+    conf->opts_add = conf->opts_remove = OPT_NONE;
+    conf->override = OR_UNSET|OR_NONE;
+    conf->override_opts = OPT_UNSET | OPT_ALL | OPT_SYM_OWNER | OPT_MULTI;
+
+    conf->content_md5 = AP_CONTENT_MD5_UNSET;
+    conf->accept_path_info = AP_ACCEPT_PATHINFO_UNSET;
+
+    conf->use_canonical_name = USE_CANONICAL_NAME_UNSET;
+    conf->use_canonical_phys_port = USE_CANONICAL_PHYS_PORT_UNSET;
+
+    conf->hostname_lookups = HOSTNAME_LOOKUP_UNSET;
+
+    /*
+     * left as NULL (we use apr_pcalloc):
+     * conf->limit_cpu = NULL;
+     * conf->limit_mem = NULL;
+     * conf->limit_nproc = NULL;
+     * conf->sec_file = NULL;
+     * conf->sec_if   = NULL;
+     */
+
+    conf->limit_req_body = AP_LIMIT_REQ_BODY_UNSET;
+    conf->limit_xml_body = AP_LIMIT_UNSET;
+
+    conf->server_signature = srv_sig_unset;
+
+    conf->add_default_charset = ADD_DEFAULT_CHARSET_UNSET;
+    conf->add_default_charset_name = DEFAULT_ADD_DEFAULT_CHARSET_NAME;
+
+    /* Overriding all negotiation
+     * Set NULL by apr_pcalloc:
+     * conf->mime_type = NULL;
+     * conf->handler = NULL;
+     * conf->output_filters = NULL;
+     * conf->input_filters = NULL;
+     */
+
+    /*
+     * Flag for use of inodes in ETags.
+     */
+    conf->etag_bits = ETAG_UNSET;
+    conf->etag_add = ETAG_UNSET;
+    conf->etag_remove = ETAG_UNSET;
+
+    conf->enable_mmap = ENABLE_MMAP_UNSET;
+    conf->enable_sendfile = ENABLE_SENDFILE_UNSET;
+    conf->allow_encoded_slashes = 0;
+    conf->decode_encoded_slashes = 0;
+
+    conf->max_ranges = AP_MAXRANGES_UNSET;
+    conf->max_overlaps = AP_MAXRANGES_UNSET;
+    conf->max_reversals = AP_MAXRANGES_UNSET;
+
+    conf->cgi_pass_auth = AP_CGI_PASS_AUTH_UNSET;
+    conf->qualify_redirect_url = AP_CORE_CONFIG_UNSET; 
+
+    return (void *)conf;
+}
+
+static void *merge_core_dir_configs(apr_pool_t *a, void *basev, void *newv)
+{
+    core_dir_config *base = (core_dir_config *)basev;
+    core_dir_config *new = (core_dir_config *)newv;
+    core_dir_config *conf;
+
+    /* Create this conf by duplicating the base, replacing elements
+     * (or creating copies for merging) where new-> values exist.
+     */
+    conf = (core_dir_config *)apr_pmemdup(a, base, sizeof(core_dir_config));
+
+    conf->d = new->d;
+    conf->d_is_fnmatch = new->d_is_fnmatch;
+    conf->d_components = new->d_components;
+    conf->r = new->r;
+    conf->refs = new->refs;
+    conf->condition = new->condition;
+
+    if (new->opts & OPT_UNSET) {
+        /* there was no explicit setting of new->opts, so we merge
+         * preserve the invariant (opts_add & opts_remove) == 0
+         */
+        conf->opts_add = (conf->opts_add & ~new->opts_remove) | new->opts_add;
+        conf->opts_remove = (conf->opts_remove & ~new->opts_add)
+                            | new->opts_remove;
+        conf->opts = (conf->opts & ~conf->opts_remove) | conf->opts_add;
+
+        /* If Includes was enabled with exec in the base config, but
+         * was enabled without exec in the new config, then disable
+         * exec in the merged set. */
+        if (((base->opts & (OPT_INCLUDES|OPT_INC_WITH_EXEC))
+             == (OPT_INCLUDES|OPT_INC_WITH_EXEC))
+            && ((new->opts & (OPT_INCLUDES|OPT_INC_WITH_EXEC))
+                == OPT_INCLUDES)) {
+            conf->opts &= ~OPT_INC_WITH_EXEC;
+        }
+    }
+    else {
+        /* otherwise we just copy, because an explicit opts setting
+         * overrides all earlier +/- modifiers
+         */
+        conf->opts = new->opts;
+        conf->opts_add = new->opts_add;
+        conf->opts_remove = new->opts_remove;
+    }
+
+    if (!(new->override & OR_UNSET)) {
+        conf->override = new->override;
+    }
+
+    if (!(new->override_opts & OPT_UNSET)) {
+        conf->override_opts = new->override_opts;
+    }
+
+    if (new->override_list != NULL) {
+        conf->override_list = new->override_list;
+    }
+
+    if (conf->response_code_exprs == NULL) {
+        conf->response_code_exprs = new->response_code_exprs;
+    }
+    else if (new->response_code_exprs != NULL) {
+        conf->response_code_exprs = apr_hash_overlay(a,
+                new->response_code_exprs, conf->response_code_exprs);
+    }
+    /* Otherwise we simply use the base->response_code_exprs array
+     */
+
+    if (new->hostname_lookups != HOSTNAME_LOOKUP_UNSET) {
+        conf->hostname_lookups = new->hostname_lookups;
+    }
+
+    if (new->content_md5 != AP_CONTENT_MD5_UNSET) {
+        conf->content_md5 = new->content_md5;
+    }
+
+    if (new->accept_path_info != AP_ACCEPT_PATHINFO_UNSET) {
+        conf->accept_path_info = new->accept_path_info;
+    }
+
+    if (new->use_canonical_name != USE_CANONICAL_NAME_UNSET) {
+        conf->use_canonical_name = new->use_canonical_name;
+    }
+
+    if (new->use_canonical_phys_port != USE_CANONICAL_PHYS_PORT_UNSET) {
+        conf->use_canonical_phys_port = new->use_canonical_phys_port;
+    }
+
+#ifdef RLIMIT_CPU
+    if (new->limit_cpu) {
+        conf->limit_cpu = new->limit_cpu;
+    }
+#endif
+
+#if defined(RLIMIT_DATA) || defined(RLIMIT_VMEM) || defined(RLIMIT_AS)
+    if (new->limit_mem) {
+        conf->limit_mem = new->limit_mem;
+    }
+#endif
+
+#ifdef RLIMIT_NPROC
+    if (new->limit_nproc) {
+        conf->limit_nproc = new->limit_nproc;
+    }
+#endif
+
+    if (new->limit_req_body != AP_LIMIT_REQ_BODY_UNSET) {
+        conf->limit_req_body = new->limit_req_body;
+    }
+
+    if (new->limit_xml_body != AP_LIMIT_UNSET)
+        conf->limit_xml_body = new->limit_xml_body;
+
+    if (!conf->sec_file) {
+        conf->sec_file = new->sec_file;
+    }
+    else if (new->sec_file) {
+        /* If we merge, the merge-result must have its own array
+         */
+        conf->sec_file = apr_array_append(a, base->sec_file, new->sec_file);
+    }
+    /* Otherwise we simply use the base->sec_file array
+     */
+
+    if (!conf->sec_if) {
+        conf->sec_if = new->sec_if;
+    }
+    else if (new->sec_if) {
+        /* If we merge, the merge-result must have its own array
+         */
+        conf->sec_if = apr_array_append(a, base->sec_if, new->sec_if);
+    }
+    /* Otherwise we simply use the base->sec_if array
+     */
+
+    if (new->server_signature != srv_sig_unset) {
+        conf->server_signature = new->server_signature;
+    }
+
+    if (new->add_default_charset != ADD_DEFAULT_CHARSET_UNSET) {
+        conf->add_default_charset = new->add_default_charset;
+        conf->add_default_charset_name = new->add_default_charset_name;
+    }
+
+    /* Overriding all negotiation
+     */
+    if (new->mime_type) {
+        conf->mime_type = new->mime_type;
+    }
+
+    if (new->handler) {
+        conf->handler = new->handler;
+    }
+    if (new->expr_handler) {
+        conf->expr_handler = new->expr_handler;
+    }
+
+    if (new->output_filters) {
+        conf->output_filters = new->output_filters;
+    }
+
+    if (new->input_filters) {
+        conf->input_filters = new->input_filters;
+    }
+
+    /*
+     * Now merge the setting of the FileETag directive.
+     */
+    if (new->etag_bits == ETAG_UNSET) {
+        conf->etag_add =
+            (conf->etag_add & (~ new->etag_remove)) | new->etag_add;
+        conf->etag_remove =
+            (conf->etag_remove & (~ new->etag_add)) | new->etag_remove;
+        conf->etag_bits =
+            (conf->etag_bits & (~ conf->etag_remove)) | conf->etag_add;
+    }
+    else {
+        conf->etag_bits = new->etag_bits;
+        conf->etag_add = new->etag_add;
+        conf->etag_remove = new->etag_remove;
+    }
+
+    if (conf->etag_bits != ETAG_NONE) {
+        conf->etag_bits &= (~ ETAG_NONE);
+    }
+
+    if (new->enable_mmap != ENABLE_MMAP_UNSET) {
+        conf->enable_mmap = new->enable_mmap;
+    }
+
+    if (new->enable_sendfile != ENABLE_SENDFILE_UNSET) {
+        conf->enable_sendfile = new->enable_sendfile;
+    }
+ 
+    if (new->read_buf_size) {
+        conf->read_buf_size = new->read_buf_size;
+    }
+    else {
+        conf->read_buf_size = base->read_buf_size;
+    }
+
+    conf->allow_encoded_slashes = new->allow_encoded_slashes;
+    conf->decode_encoded_slashes = new->decode_encoded_slashes;
+
+    if (new->log) {
+        if (!conf->log) {
+            conf->log = new->log;
+        }
+        else {
+            conf->log = ap_new_log_config(a, new->log);
+            ap_merge_log_config(base->log, conf->log);
+        }
+    }
+
+    conf->max_ranges = new->max_ranges != AP_MAXRANGES_UNSET ? new->max_ranges : base->max_ranges;
+    conf->max_overlaps = new->max_overlaps != AP_MAXRANGES_UNSET ? new->max_overlaps : base->max_overlaps;
+    conf->max_reversals = new->max_reversals != AP_MAXRANGES_UNSET ? new->max_reversals : base->max_reversals;
+
+    conf->cgi_pass_auth = new->cgi_pass_auth != AP_CGI_PASS_AUTH_UNSET ? new->cgi_pass_auth : base->cgi_pass_auth;
+
+    if (new->cgi_var_rules) {
+        if (!conf->cgi_var_rules) {
+            conf->cgi_var_rules = new->cgi_var_rules;
+        }
+        else {
+            conf->cgi_var_rules = apr_hash_overlay(a, new->cgi_var_rules, conf->cgi_var_rules);
+        }
+    }
+
+    AP_CORE_MERGE_FLAG(qualify_redirect_url, conf, base, new);
+
+    return (void*)conf;
+}
+
+#if APR_HAS_SO_ACCEPTFILTER
+#ifndef ACCEPT_FILTER_NAME
+#define ACCEPT_FILTER_NAME "httpready"
+#ifdef __FreeBSD_version
+#if __FreeBSD_version < 411000 /* httpready broken before 4.1.1 */
+#undef ACCEPT_FILTER_NAME
+#define ACCEPT_FILTER_NAME "dataready"
+#endif
+#endif
+#endif
+#endif
+
+static void *create_core_server_config(apr_pool_t *a, server_rec *s)
+{
+    core_server_config *conf;
+    int is_virtual = s->is_virtual;
+
+    conf = (core_server_config *)apr_pcalloc(a, sizeof(core_server_config));
+
+    /* global-default / global-only settings */
+
+    if (!is_virtual) {
+        conf->ap_document_root = DOCUMENT_LOCATION;
+        conf->access_name = DEFAULT_ACCESS_FNAME;
+
+        /* A mapping only makes sense in the global context */
+        conf->accf_map = apr_table_make(a, 5);
+#if APR_HAS_SO_ACCEPTFILTER
+        apr_table_setn(conf->accf_map, "http", ACCEPT_FILTER_NAME);
+        apr_table_setn(conf->accf_map, "https", "dataready");
+#elif defined(WIN32)
+        /* 'data' is disabled on Windows due to a DoS vuln (PR 59970) */
+        apr_table_setn(conf->accf_map, "http", "connect");
+        apr_table_setn(conf->accf_map, "https", "connect");
+#else
+        apr_table_setn(conf->accf_map, "http", "data");
+        apr_table_setn(conf->accf_map, "https", "data");
+#endif
+
+        conf->flush_max_threshold = AP_FLUSH_MAX_THRESHOLD;
+        conf->flush_max_pipelined = AP_FLUSH_MAX_PIPELINED;
+    }
+    else {
+        conf->flush_max_pipelined = -1;
+    }
+
+    /* initialization, no special case for global context */
+
+    conf->sec_dir = apr_array_make(a, 40, sizeof(ap_conf_vector_t *));
+    conf->sec_url = apr_array_make(a, 40, sizeof(ap_conf_vector_t *));
+
+    /* pcalloc'ed - we have NULL's/0's
+    conf->gprof_dir = NULL;
+
+    ** recursion stopper; 0 == unset
+    conf->redirect_limit = 0;
+    conf->subreq_limit = 0;
+
+    conf->protocol = NULL;
+     */
+
+    conf->trace_enable = AP_TRACE_UNSET;
+
+    conf->protocols = apr_array_make(a, 5, sizeof(const char *));
+    conf->protocols_honor_order = -1;
+    conf->merge_slashes = AP_CORE_CONFIG_UNSET; 
+    
+    conf->strict_host_check= AP_CORE_CONFIG_UNSET; 
+
+    return (void *)conf;
+}
+
+static void *merge_core_server_configs(apr_pool_t *p, void *basev, void *virtv)
+{
+    core_server_config *base = (core_server_config *)basev;
+    core_server_config *virt = (core_server_config *)virtv;
+    core_server_config *conf = (core_server_config *)
+                               apr_pmemdup(p, base, sizeof(core_server_config));
+
+    if (virt->ap_document_root)
+        conf->ap_document_root = virt->ap_document_root;
+
+    if (virt->access_name)
+        conf->access_name = virt->access_name;
+
+    /* XXX optimize to keep base->sec_ pointers if virt->sec_ array is empty */
+    conf->sec_dir = apr_array_append(p, base->sec_dir, virt->sec_dir);
+    conf->sec_url = apr_array_append(p, base->sec_url, virt->sec_url);
+
+    if (virt->redirect_limit)
+        conf->redirect_limit = virt->redirect_limit;
+
+    if (virt->subreq_limit)
+        conf->subreq_limit = virt->subreq_limit;
+
+    if (virt->trace_enable != AP_TRACE_UNSET)
+        conf->trace_enable = virt->trace_enable;
+
+    if (virt->http09_enable != AP_HTTP09_UNSET)
+        conf->http09_enable = virt->http09_enable;
+
+    if (virt->http_conformance != AP_HTTP_CONFORMANCE_UNSET)
+        conf->http_conformance = virt->http_conformance;
+
+    if (virt->http_methods != AP_HTTP_METHODS_UNSET)
+        conf->http_methods = virt->http_methods;
+
+    /* no action for virt->accf_map, not allowed per-vhost */
+
+    if (virt->protocol)
+        conf->protocol = virt->protocol;
+
+    if (virt->gprof_dir)
+        conf->gprof_dir = virt->gprof_dir;
+
+    if (virt->error_log_format)
+        conf->error_log_format = virt->error_log_format;
+
+    if (virt->error_log_conn)
+        conf->error_log_conn = virt->error_log_conn;
+
+    if (virt->error_log_req)
+        conf->error_log_req = virt->error_log_req;
+
+    conf->merge_trailers = (virt->merge_trailers != AP_MERGE_TRAILERS_UNSET)
+                           ? virt->merge_trailers
+                           : base->merge_trailers;
+
+    conf->protocols = ((virt->protocols->nelts > 0)? 
+                       virt->protocols : base->protocols);
+    conf->protocols_honor_order = ((virt->protocols_honor_order < 0)?
+                                       base->protocols_honor_order :
+                                       virt->protocols_honor_order);
+    AP_CORE_MERGE_FLAG(merge_slashes, conf, base, virt);
+    
+
+    conf->flush_max_threshold = (virt->flush_max_threshold)
+                                  ? virt->flush_max_threshold
+                                  : base->flush_max_threshold;
+    conf->flush_max_pipelined = (virt->flush_max_pipelined >= 0)
+                                  ? virt->flush_max_pipelined
+                                  : base->flush_max_pipelined;
+
+    conf->strict_host_check = (virt->strict_host_check != AP_CORE_CONFIG_UNSET)
+                              ? virt->strict_host_check 
+                              : base->strict_host_check;
+
+    AP_CORE_MERGE_FLAG(strict_host_check, conf, base, virt);
+
+    return conf;
+}
+
+/* Add per-directory configuration entry (for <directory> section);
+ * these are part of the core server config.
+ */
+
+AP_CORE_DECLARE(void) ap_add_per_dir_conf(server_rec *s, void *dir_config)
+{
+    core_server_config *sconf = ap_get_core_module_config(s->module_config);
+    void **new_space = (void **)apr_array_push(sconf->sec_dir);
+
+    *new_space = dir_config;
+}
+
+AP_CORE_DECLARE(void) ap_add_per_url_conf(server_rec *s, void *url_config)
+{
+    core_server_config *sconf = ap_get_core_module_config(s->module_config);
+    void **new_space = (void **)apr_array_push(sconf->sec_url);
+
+    *new_space = url_config;
+}
+
+AP_CORE_DECLARE(void) ap_add_file_conf(apr_pool_t *p, core_dir_config *conf,
+                                       void *url_config)
+{
+    void **new_space;
+
+    if (!conf->sec_file)
+        conf->sec_file = apr_array_make(p, 2, sizeof(ap_conf_vector_t *));
+
+    new_space = (void **)apr_array_push(conf->sec_file);
+    *new_space = url_config;
+}
+
+AP_CORE_DECLARE(const char *) ap_add_if_conf(apr_pool_t *p,
+                                             core_dir_config *conf,
+                                             void *if_config)
+{
+    void **new_space;
+    core_dir_config *new = ap_get_module_config(if_config, &core_module);
+
+    if (!conf->sec_if) {
+        conf->sec_if = apr_array_make(p, 2, sizeof(ap_conf_vector_t *));
+    }
+    if (new->condition_ifelse & AP_CONDITION_ELSE) {
+        int have_if = 0;
+        if (conf->sec_if->nelts > 0) {
+            core_dir_config *last;
+            ap_conf_vector_t *lastelt = APR_ARRAY_IDX(conf->sec_if,
+                                                      conf->sec_if->nelts - 1,
+                                                      ap_conf_vector_t *);
+            last = ap_get_module_config(lastelt, &core_module);
+            if (last->condition_ifelse & AP_CONDITION_IF)
+                have_if = 1;
+        }
+        if (!have_if)
+            return "<Else> or <ElseIf> section without previous <If> or "
+                   "<ElseIf> section in same scope";
+    }
+
+    new_space = (void **)apr_array_push(conf->sec_if);
+    *new_space = if_config;
+    return NULL;
+}
+
+
+/* We need to do a stable sort, qsort isn't stable.  So to make it stable
+ * we'll be maintaining the original index into the list, and using it
+ * as the minor key during sorting.  The major key is the number of
+ * components (where the root component is zero).
+ */
+struct reorder_sort_rec {
+    ap_conf_vector_t *elt;
+    int orig_index;
+};
+
+static int reorder_sorter(const void *va, const void *vb)
+{
+    const struct reorder_sort_rec *a = va;
+    const struct reorder_sort_rec *b = vb;
+    core_dir_config *core_a;
+    core_dir_config *core_b;
+
+    core_a = ap_get_core_module_config(a->elt);
+    core_b = ap_get_core_module_config(b->elt);
+
+    /* a regex always sorts after a non-regex
+     */
+    if (!core_a->r && core_b->r) {
+        return -1;
+    }
+    else if (core_a->r && !core_b->r) {
+        return 1;
+    }
+
+    /* we always sort next by the number of components
+     */
+    if (core_a->d_components < core_b->d_components) {
+        return -1;
+    }
+    else if (core_a->d_components > core_b->d_components) {
+        return 1;
+    }
+
+    /* They have the same number of components, we now have to compare
+     * the minor key to maintain the original order (from the config.)
+     */
+    return a->orig_index - b->orig_index;
+}
+
+void ap_core_reorder_directories(apr_pool_t *p, server_rec *s)
+{
+    core_server_config *sconf;
+    apr_array_header_t *sec_dir;
+    struct reorder_sort_rec *sortbin;
+    int nelts;
+    ap_conf_vector_t **elts;
+    int i;
+    apr_pool_t *tmp;
+
+    sconf = ap_get_core_module_config(s->module_config);
+    sec_dir = sconf->sec_dir;
+    nelts = sec_dir->nelts;
+    elts = (ap_conf_vector_t **)sec_dir->elts;
+
+    if (!nelts) {
+        /* simple case of already being sorted... */
+        /* We're not checking this condition to be fast... we're checking
+         * it to avoid trying to palloc zero bytes, which can trigger some
+         * memory debuggers to barf
+         */
+        return;
+    }
+
+    /* we have to allocate tmp space to do a stable sort */
+    apr_pool_create(&tmp, p);
+    apr_pool_tag(tmp, "core_reorder_directories");
+    sortbin = apr_palloc(tmp, sec_dir->nelts * sizeof(*sortbin));
+    for (i = 0; i < nelts; ++i) {
+        sortbin[i].orig_index = i;
+        sortbin[i].elt = elts[i];
+    }
+
+    qsort(sortbin, nelts, sizeof(*sortbin), reorder_sorter);
+
+    /* and now copy back to the original array */
+    for (i = 0; i < nelts; ++i) {
+        elts[i] = sortbin[i].elt;
+    }
+
+    apr_pool_destroy(tmp);
+}
+
+/*****************************************************************
+ *
+ * There are some elements of the core config structures in which
+ * other modules have a legitimate interest (this is ugly, but necessary
+ * to preserve NCSA back-compatibility).  So, we have a bunch of accessors
+ * here...
+ */
+
+AP_DECLARE(int) ap_allow_options(request_rec *r)
+{
+    core_dir_config *conf =
+      (core_dir_config *)ap_get_core_module_config(r->per_dir_config);
+
+    return conf->opts;
+}
+
+AP_DECLARE(int) ap_allow_overrides(request_rec *r)
+{
+    core_dir_config *conf;
+    conf = (core_dir_config *)ap_get_core_module_config(r->per_dir_config);
+
+    return conf->override;
+}
+
+/*
+ * Optional function coming from mod_authn_core, used for
+ * retrieving the type of authorization
+ */
+static APR_OPTIONAL_FN_TYPE(authn_ap_auth_type) *authn_ap_auth_type;
+
+AP_DECLARE(const char *) ap_auth_type(request_rec *r)
+{
+    if (authn_ap_auth_type) {
+        return authn_ap_auth_type(r);
+    }
+    return NULL;
+}
+
+/*
+ * Optional function coming from mod_authn_core, used for
+ * retrieving the authorization realm
+ */
+static APR_OPTIONAL_FN_TYPE(authn_ap_auth_name) *authn_ap_auth_name;
+
+AP_DECLARE(const char *) ap_auth_name(request_rec *r)
+{
+    if (authn_ap_auth_name) {
+        return authn_ap_auth_name(r);
+    }
+    return NULL;
+}
+
+/*
+ * Optional function coming from mod_access_compat, used to determine how
+   access control interacts with authentication/authorization
+ */
+static APR_OPTIONAL_FN_TYPE(access_compat_ap_satisfies) *access_compat_ap_satisfies;
+
+AP_DECLARE(int) ap_satisfies(request_rec *r)
+{
+    if (access_compat_ap_satisfies) {
+        return access_compat_ap_satisfies(r);
+    }
+    return SATISFY_NOSPEC;
+}
+
+AP_DECLARE(const char *) ap_document_root(request_rec *r) /* Don't use this! */
+{
+    core_server_config *sconf;
+    core_request_config *rconf = ap_get_core_module_config(r->request_config);
+    if (rconf->document_root)
+        return rconf->document_root;
+    sconf = ap_get_core_module_config(r->server->module_config);
+    return sconf->ap_document_root;
+}
+
+AP_DECLARE(const char *) ap_context_prefix(request_rec *r)
+{
+    core_request_config *conf = ap_get_core_module_config(r->request_config);
+    if (conf->context_prefix)
+        return conf->context_prefix;
+    else
+        return "";
+}
+
+AP_DECLARE(const char *) ap_context_document_root(request_rec *r)
+{
+    core_request_config *conf = ap_get_core_module_config(r->request_config);
+    if (conf->context_document_root)
+        return conf->context_document_root;
+    else
+        return ap_document_root(r);
+}
+
+AP_DECLARE(void) ap_set_document_root(request_rec *r, const char *document_root)
+{
+    core_request_config *conf = ap_get_core_module_config(r->request_config);
+    conf->document_root = document_root;
+}
+
+AP_DECLARE(void) ap_set_context_info(request_rec *r, const char *context_prefix,
+                                     const char *context_document_root)
+{
+    core_request_config *conf = ap_get_core_module_config(r->request_config);
+    if (context_prefix)
+        conf->context_prefix = context_prefix;
+    if (context_document_root)
+        conf->context_document_root = context_document_root;
+}
+
+/* Should probably just get rid of this... the only code that cares is
+ * part of the core anyway (and in fact, it isn't publicised to other
+ * modules).
+ */
+
+char *ap_response_code_string(request_rec *r, int error_index)
+{
+    core_dir_config *dirconf;
+    core_request_config *reqconf = ap_get_core_module_config(r->request_config);
+    const char *err;
+    const char *response;
+    ap_expr_info_t *expr;
+
+    /* check for string registered via ap_custom_response() first */
+    if (reqconf->response_code_strings != NULL
+            && reqconf->response_code_strings[error_index] != NULL) {
+        return reqconf->response_code_strings[error_index];
+    }
+
+    /* check for string specified via ErrorDocument */
+    dirconf = ap_get_core_module_config(r->per_dir_config);
+
+    if (!dirconf->response_code_exprs) {
+        return NULL;
+    }
+
+    expr = apr_hash_get(dirconf->response_code_exprs, &error_index,
+            sizeof(error_index));
+    if (!expr) {
+        return NULL;
+    }
+
+    /* special token to indicate revert back to default */
+    if ((char *) expr == &errordocument_default) {
+        return NULL;
+    }
+
+    err = NULL;
+    response = ap_expr_str_exec(r, expr, &err);
+    if (err) {
+        ap_log_rerror(
+                APLOG_MARK, APLOG_ERR, 0, r, APLOGNO(02841) "core: ErrorDocument: can't "
+                "evaluate require expression: %s", err);
+        return NULL;
+    }
+
+    /* alas, duplication required as we return not-const */
+    return apr_pstrdup(r->pool, response);
+}
+
+
+/* Code from Harald Hanche-Olsen <hanche@imf.unit.no> */
+static APR_INLINE int do_double_reverse (int double_reverse,
+                                         const char *remote_host,
+                                         apr_sockaddr_t *client_addr,
+                                         apr_pool_t *pool)
+{
+    apr_sockaddr_t *sa;
+    apr_status_t rv;
+
+    if (double_reverse) {
+        /* already done */
+        return double_reverse;
+    }
+
+    if (remote_host == NULL || remote_host[0] == '\0') {
+        /* single reverse failed, so don't bother */
+        return -1;
+    }
+
+    rv = apr_sockaddr_info_get(&sa, remote_host, APR_UNSPEC, 0, 0, pool);
+    if (rv == APR_SUCCESS) {
+        while (sa) {
+            if (apr_sockaddr_equal(sa, client_addr)) {
+                return 1;
+            }
+
+            sa = sa->next;
+        }
+    }
+
+    return -1;
+}
+
+AP_DECLARE(const char *) ap_get_remote_host(conn_rec *conn, void *dir_config,
+                                            int type, int *str_is_ip)
+{
+    int hostname_lookups;
+    int ignored_str_is_ip;
+
+    if (!str_is_ip) { /* caller doesn't want to know */
+        str_is_ip = &ignored_str_is_ip;
+    }
+    *str_is_ip = 0;
+
+    /* If we haven't checked the host name, and we want to */
+    if (dir_config) {
+        hostname_lookups = ((core_dir_config *)ap_get_core_module_config(dir_config))
+                           ->hostname_lookups;
+
+        if (hostname_lookups == HOSTNAME_LOOKUP_UNSET) {
+            hostname_lookups = HOSTNAME_LOOKUP_OFF;
+        }
+    }
+    else {
+        /* the default */
+        hostname_lookups = HOSTNAME_LOOKUP_OFF;
+    }
+
+    if (type != REMOTE_NOLOOKUP
+        && conn->remote_host == NULL
+        && (type == REMOTE_DOUBLE_REV
+        || hostname_lookups != HOSTNAME_LOOKUP_OFF)) {
+
+        if (apr_getnameinfo(&conn->remote_host, conn->client_addr, 0)
+            == APR_SUCCESS) {
+            ap_str_tolower(conn->remote_host);
+
+            if (hostname_lookups == HOSTNAME_LOOKUP_DOUBLE) {
+                conn->double_reverse = do_double_reverse(conn->double_reverse,
+                                                         conn->remote_host,
+                                                         conn->client_addr,
+                                                         conn->pool);
+                if (conn->double_reverse != 1) {
+                    conn->remote_host = NULL;
+                }
+            }
+        }
+
+        /* if failed, set it to the NULL string to indicate error */
+        if (conn->remote_host == NULL) {
+            conn->remote_host = "";
+        }
+    }
+
+    if (type == REMOTE_DOUBLE_REV) {
+        conn->double_reverse = do_double_reverse(conn->double_reverse,
+                                                 conn->remote_host,
+                                                 conn->client_addr, conn->pool);
+        if (conn->double_reverse == -1) {
+            return NULL;
+        }
+    }
+
+    /*
+     * Return the desired information; either the remote DNS name, if found,
+     * or either NULL (if the hostname was requested) or the IP address
+     * (if any identifier was requested).
+     */
+    if (conn->remote_host != NULL && conn->remote_host[0] != '\0') {
+        return conn->remote_host;
+    }
+    else {
+        if (type == REMOTE_HOST || type == REMOTE_DOUBLE_REV) {
+            return NULL;
+        }
+        else {
+            *str_is_ip = 1;
+            return conn->client_ip;
+        }
+    }
+}
+
+AP_DECLARE(const char *) ap_get_useragent_host(request_rec *r,
+                                               int type, int *str_is_ip)
+{
+    conn_rec *conn = r->connection;
+    int hostname_lookups;
+    int ignored_str_is_ip;
+
+    /* Guard here when examining the host before the read_request hook
+     * has populated an r->useragent_addr
+     */
+    if (!r->useragent_addr || (r->useragent_addr == conn->client_addr)) {
+        return ap_get_remote_host(conn, r->per_dir_config, type, str_is_ip);
+    }
+
+    if (!str_is_ip) { /* caller doesn't want to know */
+        str_is_ip = &ignored_str_is_ip;
+    }
+    *str_is_ip = 0;
+
+    hostname_lookups = ((core_dir_config *)
+                        ap_get_core_module_config(r->per_dir_config))
+                            ->hostname_lookups;
+    if (hostname_lookups == HOSTNAME_LOOKUP_UNSET) {
+        hostname_lookups = HOSTNAME_LOOKUP_OFF;
+    }
+
+    if (type != REMOTE_NOLOOKUP
+        && r->useragent_host == NULL
+        && (type == REMOTE_DOUBLE_REV
+        || hostname_lookups != HOSTNAME_LOOKUP_OFF)) {
+
+        if (apr_getnameinfo(&r->useragent_host, r->useragent_addr, 0)
+            == APR_SUCCESS) {
+            ap_str_tolower(r->useragent_host);
+
+            if (hostname_lookups == HOSTNAME_LOOKUP_DOUBLE) {
+                r->double_reverse = do_double_reverse(r->double_reverse,
+                                                      r->useragent_host,
+                                                      r->useragent_addr,
+                                                      r->pool);
+                if (r->double_reverse != 1) {
+                    r->useragent_host = NULL;
+                }
+            }
+        }
+
+        /* if failed, set it to the NULL string to indicate error */
+        if (r->useragent_host == NULL) {
+            r->useragent_host = "";
+        }
+    }
+
+    if (type == REMOTE_DOUBLE_REV) {
+        r->double_reverse = do_double_reverse(r->double_reverse,
+                                              r->useragent_host,
+                                              r->useragent_addr, r->pool);
+        if (r->double_reverse == -1) {
+            return NULL;
+        }
+    }
+
+    /*
+     * Return the desired information; either the remote DNS name, if found,
+     * or either NULL (if the hostname was requested) or the IP address
+     * (if any identifier was requested).
+     */
+    if (r->useragent_host != NULL && r->useragent_host[0] != '\0') {
+        return r->useragent_host;
+    }
+    else {
+        if (type == REMOTE_HOST || type == REMOTE_DOUBLE_REV) {
+            return NULL;
+        }
+        else {
+            *str_is_ip = 1;
+            return r->useragent_ip;
+        }
+    }
+}
+
+/*
+ * Optional function coming from mod_ident, used for looking up ident user
+ */
+static APR_OPTIONAL_FN_TYPE(ap_ident_lookup) *ident_lookup;
+
+AP_DECLARE(const char *) ap_get_remote_logname(request_rec *r)
+{
+    if (r->connection->remote_logname != NULL) {
+        return r->connection->remote_logname;
+    }
+
+    if (ident_lookup) {
+        return ident_lookup(r);
+    }
+
+    return NULL;
+}
+
+/* There are two options regarding what the "name" of a server is.  The
+ * "canonical" name as defined by ServerName and Port, or the "client's
+ * name" as supplied by a possible Host: header or full URI.
+ *
+ * The DNS option to UseCanonicalName causes this routine to do a
+ * reverse lookup on the local IP address of the connection and use
+ * that for the ServerName. This makes its value more reliable while
+ * at the same time allowing Demon's magic virtual hosting to work.
+ * The assumption is that DNS lookups are sufficiently quick...
+ * -- fanf 1998-10-03
+ */
+AP_DECLARE(const char *) ap_get_server_name(request_rec *r)
+{
+    conn_rec *conn = r->connection;
+    core_dir_config *d;
+    const char *retval;
+
+    d = (core_dir_config *)ap_get_core_module_config(r->per_dir_config);
+
+    switch (d->use_canonical_name) {
+        case USE_CANONICAL_NAME_ON:
+            retval = r->server->server_hostname;
+            break;
+        case USE_CANONICAL_NAME_DNS:
+            if (conn->local_host == NULL) {
+                if (apr_getnameinfo(&conn->local_host,
+                                conn->local_addr, 0) != APR_SUCCESS)
+                    conn->local_host = apr_pstrdup(conn->pool,
+                                               r->server->server_hostname);
+                else {
+                    ap_str_tolower(conn->local_host);
+                }
+            }
+            retval = conn->local_host;
+            break;
+        case USE_CANONICAL_NAME_OFF:
+        case USE_CANONICAL_NAME_UNSET:
+            retval = r->hostname ? r->hostname : r->server->server_hostname;
+            break;
+        default:
+            ap_log_rerror(APLOG_MARK, APLOG_ERR, 0, r, APLOGNO(00109)
+                         "ap_get_server_name: Invalid UCN Option somehow");
+            retval = "localhost";
+            break;
+    }
+    return retval;
+}
+
+/*
+ * Get the current server name from the request for the purposes
+ * of using in a URL.  If the server name is an IPv6 literal
+ * address, it will be returned in URL format (e.g., "[fe80::1]").
+ */
+AP_DECLARE(const char *) ap_get_server_name_for_url(request_rec *r)
+{
+    const char *plain_server_name = ap_get_server_name(r);
+
+#if APR_HAVE_IPV6
+    if (ap_strchr_c(plain_server_name, ':')) { /* IPv6 literal? */
+        return apr_pstrcat(r->pool, "[", plain_server_name, "]", NULL);
+    }
+#endif
+    return plain_server_name;
+}
+
+AP_DECLARE(apr_port_t) ap_get_server_port(const request_rec *r)
+{
+    apr_port_t port;
+    core_dir_config *d =
+      (core_dir_config *)ap_get_core_module_config(r->per_dir_config);
+
+    switch (d->use_canonical_name) {
+        case USE_CANONICAL_NAME_OFF:
+        case USE_CANONICAL_NAME_DNS:
+        case USE_CANONICAL_NAME_UNSET:
+            if (d->use_canonical_phys_port == USE_CANONICAL_PHYS_PORT_ON)
+                port = r->parsed_uri.port_str ? r->parsed_uri.port :
+                       r->connection->local_addr->port ? r->connection->local_addr->port :
+                       r->server->port ? r->server->port :
+                       ap_default_port(r);
+            else /* USE_CANONICAL_PHYS_PORT_OFF or USE_CANONICAL_PHYS_PORT_UNSET */
+                port = r->parsed_uri.port_str ? r->parsed_uri.port :
+                       r->server->port ? r->server->port :
+                       ap_default_port(r);
+            break;
+        case USE_CANONICAL_NAME_ON:
+            /* With UseCanonicalName on (and in all versions prior to 1.3)
+             * Apache will use the hostname and port specified in the
+             * ServerName directive to construct a canonical name for the
+             * server. (If no port was specified in the ServerName
+             * directive, Apache uses the port supplied by the client if
+             * any is supplied, and finally the default port for the protocol
+             * used.
+             */
+            if (d->use_canonical_phys_port == USE_CANONICAL_PHYS_PORT_ON)
+                port = r->server->port ? r->server->port :
+                       r->connection->local_addr->port ? r->connection->local_addr->port :
+                       ap_default_port(r);
+            else /* USE_CANONICAL_PHYS_PORT_OFF or USE_CANONICAL_PHYS_PORT_UNSET */
+                port = r->server->port ? r->server->port :
+                       ap_default_port(r);
+            break;
+        default:
+            ap_log_rerror(APLOG_MARK, APLOG_ERR, 0, r, APLOGNO(00110)
+                         "ap_get_server_port: Invalid UCN Option somehow");
+            port = ap_default_port(r);
+            break;
+    }
+
+    return port;
+}
+
+AP_DECLARE(char *) ap_construct_url(apr_pool_t *p, const char *uri,
+                                    request_rec *r)
+{
+    unsigned port = ap_get_server_port(r);
+    const char *host = ap_get_server_name_for_url(r);
+
+    if (ap_is_default_port(port, r)) {
+        return apr_pstrcat(p, ap_http_scheme(r), "://", host, uri, NULL);
+    }
+
+    return apr_psprintf(p, "%s://%s:%u%s", ap_http_scheme(r), host, port, uri);
+}
+
+AP_DECLARE(apr_off_t) ap_get_limit_req_body(const request_rec *r)
+{
+    core_dir_config *d =
+      (core_dir_config *)ap_get_core_module_config(r->per_dir_config);
+
+    if (d->limit_req_body == AP_LIMIT_REQ_BODY_UNSET) {
+        return AP_DEFAULT_LIMIT_REQ_BODY;
+    }
+
+    return d->limit_req_body;
+}
+
+AP_DECLARE(apr_size_t) ap_get_read_buf_size(const request_rec *r)
+{
+    core_dir_config *d = ap_get_core_module_config(r->per_dir_config);
+
+    return d->read_buf_size ? d->read_buf_size : AP_IOBUFSIZE;
+}
+
+
+/*****************************************************************
+ *
+ * Commands... this module handles almost all of the NCSA httpd.conf
+ * commands, but most of the old srm.conf is in the modules.
+ */
+
+
+/* returns a parent if it matches the given directive */
+static const ap_directive_t * find_parent(const ap_directive_t *dirp,
+                                          const char *what)
+{
+    while (dirp->parent != NULL) {
+        dirp = dirp->parent;
+
+        /* ### it would be nice to have atom-ized directives */
+        if (ap_cstr_casecmp(dirp->directive, what) == 0)
+            return dirp;
+    }
+
+    return NULL;
+}
+
+AP_DECLARE(const char *) ap_check_cmd_context(cmd_parms *cmd,
+                                              unsigned forbidden)
+{
+    const char *gt = (cmd->cmd->name[0] == '<'
+                      && cmd->cmd->name[strlen(cmd->cmd->name)-1] != '>')
+                         ? ">" : "";
+    const ap_directive_t *found;
+
+    if ((forbidden & NOT_IN_VIRTUALHOST) && cmd->server->is_virtual) {
+        return apr_pstrcat(cmd->pool, cmd->cmd->name, gt,
+                           " cannot occur within <VirtualHost> section", NULL);
+    }
+
+    if ((forbidden & NOT_IN_DIR_CONTEXT) && cmd->limited != -1) {
+        return apr_pstrcat(cmd->pool, cmd->cmd->name, gt,
+                           " cannot occur within <Limit> or <LimitExcept> "
+                           "section", NULL);
+    }
+
+    if ((forbidden & NOT_IN_HTACCESS) && (cmd->pool == cmd->temp_pool)) {
+         return apr_pstrcat(cmd->pool, cmd->cmd->name, gt,
+                            " cannot occur within htaccess files", NULL);
+    }
+
+    if ((forbidden & NOT_IN_DIR_LOC_FILE) == NOT_IN_DIR_LOC_FILE) {
+        if (cmd->path != NULL) {
+            return apr_pstrcat(cmd->pool, cmd->cmd->name, gt,
+                            " cannot occur within directory context", NULL);
+        }
+        if (cmd->cmd->req_override & EXEC_ON_READ) {
+            /* EXEC_ON_READ must be NOT_IN_DIR_LOC_FILE, if not, it will
+             * (deliberately) segfault below in the individual tests...
+             */
+            return NULL;
+        }
+    }
+
+    if (((forbidden & NOT_IN_DIRECTORY)
+         && ((found = find_parent(cmd->directive, "<Directory"))
+             || (found = find_parent(cmd->directive, "<DirectoryMatch"))))
+        || ((forbidden & NOT_IN_LOCATION)
+            && ((found = find_parent(cmd->directive, "<Location"))
+                || (found = find_parent(cmd->directive, "<LocationMatch"))))
+        || ((forbidden & NOT_IN_FILES)
+            && ((found = find_parent(cmd->directive, "<Files"))
+                || (found = find_parent(cmd->directive, "<FilesMatch"))
+                || (found = find_parent(cmd->directive, "<If"))
+                || (found = find_parent(cmd->directive, "<ElseIf"))
+                || (found = find_parent(cmd->directive, "<Else"))))
+        || ((forbidden & NOT_IN_PROXY)
+            && ((found = find_parent(cmd->directive, "<Proxy"))
+                || (found = find_parent(cmd->directive, "<ProxyMatch"))))) {
+        return apr_pstrcat(cmd->pool, cmd->cmd->name, gt,
+                           " cannot occur within ", found->directive,
+                           "> section", NULL);
+    }
+
+    return NULL;
+}
+
+static const char *set_access_name(cmd_parms *cmd, void *dummy,
+                                   const char *arg)
+{
+    void *sconf = cmd->server->module_config;
+    core_server_config *conf = ap_get_core_module_config(sconf);
+
+    const char *err = ap_check_cmd_context(cmd, NOT_IN_DIR_CONTEXT);
+    if (err != NULL) {
+        return err;
+    }
+
+    conf->access_name = apr_pstrdup(cmd->pool, arg);
+    return NULL;
+}
+
+AP_DECLARE(const char *) ap_resolve_env(apr_pool_t *p, const char * word)
+{
+# define SMALL_EXPANSION 5
+    struct sll {
+        struct sll *next;
+        const char *string;
+        apr_size_t len;
+    } *result, *current, sresult[SMALL_EXPANSION];
+    char *res_buf, *cp;
+    const char *s, *e, *ep;
+    unsigned spc;
+    apr_size_t outlen;
+
+    s = ap_strchr_c(word, '$');
+    if (!s) {
+        return word;
+    }
+
+    /* well, actually something to do */
+    ep = word + strlen(word);
+    spc = 0;
+    result = current = &(sresult[spc++]);
+    current->next = NULL;
+    current->string = word;
+    current->len = s - word;
+    outlen = current->len;
+
+    do {
+        /* prepare next entry */
+        if (current->len) {
+            current->next = (spc < SMALL_EXPANSION)
+                            ? &(sresult[spc++])
+                            : (struct sll *)apr_palloc(p,
+                                                       sizeof(*current->next));
+            current = current->next;
+            current->next = NULL;
+            current->len = 0;
+        }
+
+        if (*s == '$') {
+            if (s[1] == '{' && (e = ap_strchr_c(s+2, '}'))) {
+                char *name = apr_pstrmemdup(p, s+2, e-s-2);
+                word = NULL;
+                if (server_config_defined_vars)
+                    word = apr_table_get(server_config_defined_vars, name);
+                if (!word)
+                    word = apr_pstrdup(p, getenv(name));
+                if (word) {
+                    current->string = word;
+                    current->len = strlen(word);
+                    outlen += current->len;
+                }
+                else {
+                    if (ap_strchr(name, ':') == 0)
+                        ap_log_error(APLOG_MARK, APLOG_WARNING, 0, NULL, APLOGNO(00111)
+                                     "Config variable ${%s} is not defined",
+                                     name);
+                    current->string = s;
+                    current->len = e - s + 1;
+                    outlen += current->len;
+                }
+                s = e + 1;
+            }
+            else {
+                current->string = s++;
+                current->len = 1;
+                ++outlen;
+            }
+        }
+        else {
+            word = s;
+            s = ap_strchr_c(s, '$');
+            current->string = word;
+            current->len = s ? s - word : ep - word;
+            outlen += current->len;
+        }
+    } while (s && *s);
+
+    /* assemble result */
+    res_buf = cp = apr_palloc(p, outlen + 1);
+    do {
+        if (result->len) {
+            memcpy(cp, result->string, result->len);
+            cp += result->len;
+        }
+        result = result->next;
+    } while (result);
+    res_buf[outlen] = '\0';
+
+    return res_buf;
+}
+
+static int reset_config_defines(void *dummy)
+{
+    ap_server_config_defines = saved_server_config_defines;
+    saved_server_config_defines = NULL;
+    server_config_defined_vars = NULL;
+    ap_runtime_dir = NULL;
+    return OK;
+}
+
+/*
+ * Make sure we can revert the effects of Define/UnDefine when restarting.
+ * This function must be called once per loading of the config, before
+ * ap_server_config_defines is changed. This may be during reading of the
+ * config, which is even before the pre_config hook is run (due to
+ * EXEC_ON_READ for Define/UnDefine).
+ */
+static void init_config_defines(apr_pool_t *pconf)
+{
+    saved_server_config_defines = ap_server_config_defines;
+    /* Use apr_array_copy instead of apr_array_copy_hdr because it does not
+     * protect from the way unset_define removes entries.
+     */
+    ap_server_config_defines = apr_array_copy(pconf, ap_server_config_defines);
+}
+
+static const char *set_define(cmd_parms *cmd, void *dummy,
+                              const char *name, const char *value)
+{
+    const char *err = ap_check_cmd_context(cmd, NOT_IN_HTACCESS);
+    if (err)
+        return err;
+    if (ap_strchr_c(name, ':') != NULL) {
+        return "Variable name must not contain ':'";
+    }
+
+    if (!saved_server_config_defines) {
+        init_config_defines(cmd->pool);
+    }
+    if (!ap_exists_config_define(name)) {
+        *(const char **)apr_array_push(ap_server_config_defines) = name;
+    }
+    if (value) {
+        if (!server_config_defined_vars) {
+            server_config_defined_vars = apr_table_make(cmd->pool, 5);
+        }
+        apr_table_setn(server_config_defined_vars, name, value);
+    }
+
+    return NULL;
+}
+
+static const char *unset_define(cmd_parms *cmd, void *dummy,
+                                const char *name)
+{
+    int i;
+    const char **defines;
+    const char *err = ap_check_cmd_context(cmd, NOT_IN_HTACCESS);
+    if (err)
+        return err;
+    if (ap_strchr_c(name, ':') != NULL) {
+        return "Variable name must not contain ':'";
+    }
+
+    if (!saved_server_config_defines) {
+        init_config_defines(cmd->pool);
+    }
+
+    defines = (const char **)ap_server_config_defines->elts;
+    for (i = 0; i < ap_server_config_defines->nelts; i++) {
+        if (strcmp(defines[i], name) == 0) {
+            defines[i] = *(const char **)apr_array_pop(ap_server_config_defines);
+            break;
+        }
+    }
+
+    if (server_config_defined_vars) {
+        apr_table_unset(server_config_defined_vars, name);
+    }
+
+    return NULL;
+}
+
+static const char *generate_error(cmd_parms *cmd, void *dummy,
+                                  const char *arg)
+{
+    if (!arg || !*arg) {
+        return "The Error directive was used with no message.";
+    }
+
+    if (*arg == '"' || *arg == '\'') { /* strip off quotes */
+        apr_size_t len = strlen(arg);
+        char last = *(arg + len - 1);
+
+        if (*arg == last) {
+            return apr_pstrndup(cmd->pool, arg + 1, len - 2);
+        }
+    }
+
+    return arg;
+}
+
+#ifdef GPROF
+static const char *set_gprof_dir(cmd_parms *cmd, void *dummy, const char *arg)
+{
+    void *sconf = cmd->server->module_config;
+    core_server_config *conf = ap_get_core_module_config(sconf);
+
+    const char *err = ap_check_cmd_context(cmd, NOT_IN_DIR_CONTEXT);
+    if (err != NULL) {
+        return err;
+    }
+
+    conf->gprof_dir = apr_pstrdup(cmd->pool, arg);
+    return NULL;
+}
+#endif /*GPROF*/
+
+static const char *set_add_default_charset(cmd_parms *cmd,
+                                           void *d_, const char *arg)
+{
+    core_dir_config *d = d_;
+
+    if (!ap_cstr_casecmp(arg, "Off")) {
+       d->add_default_charset = ADD_DEFAULT_CHARSET_OFF;
+    }
+    else if (!ap_cstr_casecmp(arg, "On")) {
+       d->add_default_charset = ADD_DEFAULT_CHARSET_ON;
+       d->add_default_charset_name = DEFAULT_ADD_DEFAULT_CHARSET_NAME;
+    }
+    else {
+       d->add_default_charset = ADD_DEFAULT_CHARSET_ON;
+       d->add_default_charset_name = arg;
+    }
+
+    return NULL;
+}
+
+static const char *set_document_root(cmd_parms *cmd, void *dummy,
+                                     const char *arg)
+{
+    void *sconf = cmd->server->module_config;
+    core_server_config *conf = ap_get_core_module_config(sconf);
+
+    const char *err = ap_check_cmd_context(cmd, NOT_IN_DIR_CONTEXT);
+    if (err != NULL) {
+        return err;
+    }
+
+    /* When ap_document_root_check is false; skip all the stuff below */
+    if (!ap_document_root_check) {
+       conf->ap_document_root = arg;
+       return NULL;
+    }
+
+    /* Make it absolute, relative to ServerRoot */
+    arg = ap_server_root_relative(cmd->pool, arg);
+    if (arg == NULL) {
+        return "DocumentRoot must be a directory";
+    }
+
+    /* TODO: ap_configtestonly */
+    if (apr_filepath_merge((char**)&conf->ap_document_root, NULL, arg,
+                           APR_FILEPATH_TRUENAME, cmd->pool) != APR_SUCCESS
+        || !ap_is_directory(cmd->temp_pool, arg)) {
+        if (cmd->server->is_virtual) {
+            ap_log_perror(APLOG_MARK, APLOG_STARTUP, 0,
+                          cmd->pool, APLOGNO(00112)
+                          "Warning: DocumentRoot [%s] does not exist",
+                          arg);
+            conf->ap_document_root = arg;
+        }
+        else {
+            return apr_psprintf(cmd->pool, 
+                                "DocumentRoot '%s' is not a directory, or is not readable",
+                                arg);
+        }
+    }
+    return NULL;
+}
+
+AP_DECLARE(void) ap_custom_response(request_rec *r, int status,
+                                    const char *string)
+{
+    core_request_config *conf = ap_get_core_module_config(r->request_config);
+    int idx;
+
+    if (conf->response_code_strings == NULL) {
+        conf->response_code_strings =
+            apr_pcalloc(r->pool,
+                        sizeof(*conf->response_code_strings) * RESPONSE_CODES);
+    }
+
+    idx = ap_index_of_response(status);
+
+    conf->response_code_strings[idx] =
+       ((ap_is_url(string) || (*string == '/')) && (*string != '"')) ?
+       apr_pstrdup(r->pool, string) : apr_pstrcat(r->pool, "\"", string, NULL);
+}
+
+static const char *set_error_document(cmd_parms *cmd, void *conf_,
+                                      const char *errno_str, const char *msg)
+{
+    core_dir_config *conf = conf_;
+    int error_number, index_number, idx500;
+    enum { MSG, LOCAL_PATH, REMOTE_PATH } what = MSG;
+
+    /* 1st parameter should be a 3 digit number, which we recognize;
+     * convert it into an array index
+     */
+    error_number = atoi(errno_str);
+    idx500 = ap_index_of_response(HTTP_INTERNAL_SERVER_ERROR);
+
+    if (error_number == HTTP_INTERNAL_SERVER_ERROR) {
+        index_number = idx500;
+    }
+    else if ((index_number = ap_index_of_response(error_number)) == idx500) {
+        return apr_pstrcat(cmd->pool, "Unsupported HTTP response code ",
+                           errno_str, NULL);
+    }
+
+    /* Heuristic to determine second argument. */
+    if (ap_strchr_c(msg,' '))
+        what = MSG;
+    else if (msg[0] == '/')
+        what = LOCAL_PATH;
+    else if (ap_is_url(msg))
+        what = REMOTE_PATH;
+    else
+        what = MSG;
+
+    /* The entry should be ignored if it is a full URL for a 401 error */
+
+    if (error_number == 401 && what == REMOTE_PATH) {
+        ap_log_error(APLOG_MARK, APLOG_NOTICE, 0, cmd->server, APLOGNO(00113)
+                     "%s:%d cannot use a full URL in a 401 ErrorDocument "
+                     "directive --- ignoring!", cmd->directive->filename, cmd->directive->line_num);
+    }
+    else { /* Store it... */
+        if (conf->response_code_exprs == NULL) {
+            conf->response_code_exprs = apr_hash_make(cmd->pool);
+        }
+
+        if (ap_cstr_casecmp(msg, "default") == 0) {
+            /* special case: ErrorDocument 404 default restores the
+             * canned server error response
+             */
+            apr_hash_set(conf->response_code_exprs,
+                    apr_pmemdup(cmd->pool, &index_number, sizeof(index_number)),
+                    sizeof(index_number), &errordocument_default);
+        }
+        else {
+            ap_expr_info_t *expr;
+            const char *expr_err = NULL;
+
+            /* hack. Prefix a " if it is a msg; as that is what
+             * http_protocol.c relies on to distinguish between
+             * a msg and a (local) path.
+             */
+            const char *response =
+                    (what == MSG) ? apr_pstrcat(cmd->pool, "\"", msg, NULL) :
+                            apr_pstrdup(cmd->pool, msg);
+
+            expr = ap_expr_parse_cmd(cmd, response, AP_EXPR_FLAG_STRING_RESULT,
+                    &expr_err, NULL);
+
+            if (expr_err) {
+                return apr_pstrcat(cmd->temp_pool,
+                                   "Cannot parse expression in ErrorDocument: ",
+                                   expr_err, NULL);
+            }
+
+            apr_hash_set(conf->response_code_exprs,
+                    apr_pmemdup(cmd->pool, &index_number, sizeof(index_number)),
+                    sizeof(index_number), expr);
+
+        }
+    }
+
+    return NULL;
+}
+
+static const char *set_allow_opts(cmd_parms *cmd, allow_options_t *opts,
+                                  const char *l)
+{
+    allow_options_t opt;
+    int first = 1;
+
+    char *w, *p = (char *) l;
+    char *tok_state;
+
+    while ((w = apr_strtok(p, ",", &tok_state)) != NULL) {
+
+        if (first) {
+            p = NULL;
+            *opts = OPT_NONE;
+            first = 0;
+        }
+
+        if (!ap_cstr_casecmp(w, "Indexes")) {
+            opt = OPT_INDEXES;
+        }
+        else if (!ap_cstr_casecmp(w, "Includes")) {
+            /* If Includes is permitted, both Includes and
+             * IncludesNOEXEC may be changed. */
+            opt = (OPT_INCLUDES | OPT_INC_WITH_EXEC);
+        }
+        else if (!ap_cstr_casecmp(w, "IncludesNOEXEC")) {
+            opt = OPT_INCLUDES;
+        }
+        else if (!ap_cstr_casecmp(w, "FollowSymLinks")) {
+            opt = OPT_SYM_LINKS;
+        }
+        else if (!ap_cstr_casecmp(w, "SymLinksIfOwnerMatch")) {
+            opt = OPT_SYM_OWNER;
+        }
+        else if (!ap_cstr_casecmp(w, "ExecCGI")) {
+            opt = OPT_EXECCGI;
+        }
+        else if (!ap_cstr_casecmp(w, "MultiViews")) {
+            opt = OPT_MULTI;
+        }
+        else if (!ap_cstr_casecmp(w, "RunScripts")) { /* AI backcompat. Yuck */
+            opt = OPT_MULTI|OPT_EXECCGI;
+        }
+        else if (!ap_cstr_casecmp(w, "None")) {
+            opt = OPT_NONE;
+        }
+        else if (!ap_cstr_casecmp(w, "All")) {
+            opt = OPT_ALL;
+        }
+        else {
+            return apr_pstrcat(cmd->pool, "Illegal option ", w, NULL);
+        }
+
+        *opts |= opt;
+    }
+
+    (*opts) &= (~OPT_UNSET);
+
+    return NULL;
+}
+
+static const char *set_override(cmd_parms *cmd, void *d_, const char *l)
+{
+    core_dir_config *d = d_;
+    char *w;
+    char *k, *v;
+    const char *err;
+
+    /* Throw a warning if we're in <Location> or <Files> */
+    if (ap_check_cmd_context(cmd, NOT_IN_LOCATION | NOT_IN_FILES)) {
+        ap_log_error(APLOG_MARK, APLOG_WARNING, 0, cmd->server, APLOGNO(00114)
+                     "Useless use of AllowOverride in line %d of %s.",
+                     cmd->directive->line_num, cmd->directive->filename);
+    }
+    if ((err = ap_check_cmd_context(cmd, NOT_IN_HTACCESS)) != NULL)
+        return err;
+
+    d->override = OR_NONE;
+    while (l[0]) {
+        w = ap_getword_conf(cmd->temp_pool, &l);
+
+        k = w;
+        v = strchr(k, '=');
+        if (v) {
+                *v++ = '\0';
+        }
+
+        if (!ap_cstr_casecmp(w, "Limit")) {
+            d->override |= OR_LIMIT;
+        }
+        else if (!ap_cstr_casecmp(k, "Options")) {
+            d->override |= OR_OPTIONS;
+            if (v)
+                set_allow_opts(cmd, &(d->override_opts), v);
+            else
+                d->override_opts = OPT_ALL;
+        }
+        else if (!ap_cstr_casecmp(w, "FileInfo")) {
+            d->override |= OR_FILEINFO;
+        }
+        else if (!ap_cstr_casecmp(w, "AuthConfig")) {
+            d->override |= OR_AUTHCFG;
+        }
+        else if (!ap_cstr_casecmp(w, "Indexes")) {
+            d->override |= OR_INDEXES;
+        }
+        else if (!ap_cstr_casecmp(w, "Nonfatal")) {
+            if (!v) {
+                return apr_pstrcat(cmd->pool, "=Override, =Unknown or =All expected after ", w, NULL);
+            }
+            else if (!ap_cstr_casecmp(v, "Override")) {
+                d->override |= NONFATAL_OVERRIDE;
+            }
+            else if (!ap_cstr_casecmp(v, "Unknown")) {
+                d->override |= NONFATAL_UNKNOWN;
+            }
+            else if (!ap_cstr_casecmp(v, "All")) {
+                d->override |= NONFATAL_ALL;
+            }
+        }
+        else if (!ap_cstr_casecmp(w, "None")) {
+            d->override = OR_NONE;
+        }
+        else if (!ap_cstr_casecmp(w, "All")) {
+            d->override = OR_ALL;
+        }
+        else {
+            return apr_pstrcat(cmd->pool, "Illegal override option ", w, NULL);
+        }
+
+        d->override &= ~OR_UNSET;
+    }
+
+    return NULL;
+}
+
+static const char *set_cgi_pass_auth(cmd_parms *cmd, void *d_, int flag)
+{
+    core_dir_config *d = d_;
+
+    d->cgi_pass_auth = flag ? AP_CGI_PASS_AUTH_ON : AP_CGI_PASS_AUTH_OFF;
+
+    return NULL;
+}
+
+static const char *set_cgi_var(cmd_parms *cmd, void *d_,
+                               const char *var, const char *rule_)
+{
+    core_dir_config *d = d_;
+    char *rule = apr_pstrdup(cmd->pool, rule_);
+
+    ap_str_tolower(rule);
+
+    if (!strcmp(var, "REQUEST_URI")) {
+        if (strcmp(rule, "current-uri") && strcmp(rule, "original-uri")) {
+            return "Valid rules for REQUEST_URI are 'current-uri' and 'original-uri'";
+        }
+    }
+    else {
+        return apr_pstrcat(cmd->pool, "Unrecognized CGI variable: \"",
+                           var, "\"", NULL);
+    }
+
+    if (!d->cgi_var_rules) {
+        d->cgi_var_rules = apr_hash_make(cmd->pool);
+    }
+    apr_hash_set(d->cgi_var_rules, var, APR_HASH_KEY_STRING, rule);
+    return NULL;
+}
+
+static const char *set_qualify_redirect_url(cmd_parms *cmd, void *d_, int flag)
+{
+    core_dir_config *d = d_;
+
+    d->qualify_redirect_url = flag ? AP_CORE_CONFIG_ON : AP_CORE_CONFIG_OFF;
+
+    return NULL;
+}
+
+static const char *set_core_server_flag(cmd_parms *cmd, void *s_, int flag)
+{
+    core_server_config *conf =
+        ap_get_core_module_config(cmd->server->module_config);
+    return ap_set_flag_slot(cmd, conf, flag);
+}
+
+static const char *set_override_list(cmd_parms *cmd, void *d_, int argc, char *const argv[])
+{
+    core_dir_config *d = d_;
+    int i;
+    const char *err;
+
+    /* Throw a warning if we're in <Location> or <Files> */
+    if (ap_check_cmd_context(cmd, NOT_IN_LOCATION | NOT_IN_FILES)) {
+        ap_log_error(APLOG_MARK, APLOG_WARNING, 0, cmd->server, APLOGNO(00115)
+                     "Useless use of AllowOverrideList at %s:%d",
+                     cmd->directive->filename, cmd->directive->line_num);
+    }
+    if ((err = ap_check_cmd_context(cmd, NOT_IN_HTACCESS)) != NULL)
+        return err;
+
+    d->override_list = apr_table_make(cmd->pool, argc);
+
+    for (i = 0; i < argc; i++) {
+        if (!ap_cstr_casecmp(argv[i], "None")) {
+            if (argc != 1) {
+                return "'None' not allowed with other directives in "
+                       "AllowOverrideList";
+            }
+            return NULL;
+        }
+        else {
+            const command_rec *result = NULL;
+            module *mod = ap_top_module;
+
+            result = ap_find_command_in_modules(argv[i], &mod);
+            if (result == NULL) {
+                ap_log_error(APLOG_MARK, APLOG_WARNING, 0, cmd->server,
+                             APLOGNO(00116) "Discarding unrecognized "
+                             "directive `%s' in AllowOverrideList at %s:%d",
+                             argv[i], cmd->directive->filename,
+                             cmd->directive->line_num);
+                continue;
+            }
+            else if ((result->req_override & (OR_ALL|ACCESS_CONF)) == 0) {
+                ap_log_error(APLOG_MARK, APLOG_WARNING, 0, cmd->server,
+                             APLOGNO(02304) "Discarding directive `%s' not "
+                             "allowed in AllowOverrideList at %s:%d",
+                             argv[i], cmd->directive->filename,
+                             cmd->directive->line_num);
+                continue;
+            }
+            else {
+                apr_table_setn(d->override_list, argv[i], "1");
+            }
+        }
+    }
+
+    return NULL;
+}
+
+static const char *set_options(cmd_parms *cmd, void *d_, const char *l)
+{
+    core_dir_config *d = d_;
+    allow_options_t opt;
+    int first = 1;
+    int merge = 0;
+    int all_none = 0;
+    char action;
+
+    while (l[0]) {
+        char *w = ap_getword_conf(cmd->temp_pool, &l);
+        action = '\0';
+
+        if (*w == '+' || *w == '-') {
+            action = *(w++);
+            if (!merge && !first && !all_none) {
+                return "Either all Options must start with + or -, or no Option may.";
+            }
+            merge = 1;
+        }
+        else if (first) {
+            d->opts = OPT_NONE;
+        }
+        else if (merge) {
+            return "Either all Options must start with + or -, or no Option may.";
+        }
+
+        if (!ap_cstr_casecmp(w, "Indexes")) {
+            opt = OPT_INDEXES;
+        }
+        else if (!ap_cstr_casecmp(w, "Includes")) {
+            opt = (OPT_INCLUDES | OPT_INC_WITH_EXEC);
+        }
+        else if (!ap_cstr_casecmp(w, "IncludesNOEXEC")) {
+            opt = OPT_INCLUDES;
+        }
+        else if (!ap_cstr_casecmp(w, "FollowSymLinks")) {
+            opt = OPT_SYM_LINKS;
+        }
+        else if (!ap_cstr_casecmp(w, "SymLinksIfOwnerMatch")) {
+            opt = OPT_SYM_OWNER;
+        }
+        else if (!ap_cstr_casecmp(w, "ExecCGI")) {
+            opt = OPT_EXECCGI;
+        }
+        else if (!ap_cstr_casecmp(w, "MultiViews")) {
+            opt = OPT_MULTI;
+        }
+        else if (!ap_cstr_casecmp(w, "RunScripts")) { /* AI backcompat. Yuck */
+            opt = OPT_MULTI|OPT_EXECCGI;
+        }
+        else if (!ap_cstr_casecmp(w, "None")) {
+            if (!first) {
+                return "'Options None' must be the first Option given.";
+            }
+            else if (merge) { /* Only works since None may not follow any other option. */
+                return "You may not use 'Options +None' or 'Options -None'.";
+            }
+            opt = OPT_NONE;
+            all_none = 1;
+        }
+        else if (!ap_cstr_casecmp(w, "All")) {
+            if (!first) {
+                return "'Options All' must be the first option given.";
+            }
+            else if (merge) { /* Only works since All may not follow any other option. */
+                return "You may not use 'Options +All' or 'Options -All'.";
+            }
+            opt = OPT_ALL;
+            all_none = 1;
+        }
+        else {
+            return apr_pstrcat(cmd->pool, "Illegal option ", w, NULL);
+        }
+
+        if ( (cmd->override_opts & opt) != opt ) {
+            return apr_pstrcat(cmd->pool, "Option ", w, " not allowed here", NULL);
+        }
+        else if (action == '-') {
+            /* we ensure the invariant (d->opts_add & d->opts_remove) == 0 */
+            d->opts_remove |= opt;
+            d->opts_add &= ~opt;
+            d->opts &= ~opt;
+        }
+        else if (action == '+') {
+            d->opts_add |= opt;
+            d->opts_remove &= ~opt;
+            d->opts |= opt;
+        }
+        else {
+            d->opts |= opt;
+        }
+
+        first = 0;
+    }
+
+    return NULL;
+}
+
+static const char *set_default_type(cmd_parms *cmd, void *d_,
+                                   const char *arg)
+{
+    if ((ap_cstr_casecmp(arg, "off") != 0) && (ap_cstr_casecmp(arg, "none") != 0)) {
+        ap_log_error(APLOG_MARK, APLOG_WARNING, 0, cmd->server, APLOGNO(00117)
+              "Ignoring deprecated use of DefaultType in line %d of %s.",
+                     cmd->directive->line_num, cmd->directive->filename);
+    }
+
+    return NULL;
+}
+
+static const char *set_sethandler(cmd_parms *cmd,
+                                     void *d_,
+                                     const char *arg_)
+{
+    core_dir_config *dirconf = d_;
+    const char *err;
+    dirconf->expr_handler = ap_expr_parse_cmd(cmd, arg_,
+                                          AP_EXPR_FLAG_STRING_RESULT,
+                                          &err, NULL);
+    if (err) {
+        return apr_pstrcat(cmd->pool,
+                "Can't parse expression : ", err, NULL);
+    }
+    return NULL;
+}
+
+/*
+ * Note what data should be used when forming file ETag values.
+ * It would be nicer to do this as an ITERATE, but then we couldn't
+ * remember the +/- state properly.
+ */
+static const char *set_etag_bits(cmd_parms *cmd, void *mconfig,
+                                 const char *args_p)
+{
+    core_dir_config *cfg;
+    etag_components_t bit;
+    char action;
+    char *token;
+    const char *args;
+    int valid;
+    int first;
+    int explicit;
+
+    cfg = (core_dir_config *)mconfig;
+
+    args = args_p;
+    first = 1;
+    explicit = 0;
+    while (args[0] != '\0') {
+        action = '*';
+        bit = ETAG_UNSET;
+        valid = 1;
+        token = ap_getword_conf(cmd->temp_pool, &args);
+        if ((*token == '+') || (*token == '-')) {
+            action = *token;
+            token++;
+        }
+        else {
+            /*
+             * The occurrence of an absolute setting wipes
+             * out any previous relative ones.  The first such
+             * occurrence forgets any inherited ones, too.
+             */
+            if (first) {
+                cfg->etag_bits = ETAG_UNSET;
+                cfg->etag_add = ETAG_UNSET;
+                cfg->etag_remove = ETAG_UNSET;
+                first = 0;
+            }
+        }
+
+        if (ap_cstr_casecmp(token, "None") == 0) {
+            if (action != '*') {
+                valid = 0;
+            }
+            else {
+                cfg->etag_bits = bit = ETAG_NONE;
+                explicit = 1;
+            }
+        }
+        else if (ap_cstr_casecmp(token, "All") == 0) {
+            if (action != '*') {
+                valid = 0;
+            }
+            else {
+                explicit = 1;
+                cfg->etag_bits = bit = ETAG_ALL;
+            }
+        }
+        else if (ap_cstr_casecmp(token, "Size") == 0) {
+            bit = ETAG_SIZE;
+        }
+        else if ((ap_cstr_casecmp(token, "LMTime") == 0)
+                 || (ap_cstr_casecmp(token, "MTime") == 0)
+                 || (ap_cstr_casecmp(token, "LastModified") == 0)) {
+            bit = ETAG_MTIME;
+        }
+        else if (ap_cstr_casecmp(token, "INode") == 0) {
+            bit = ETAG_INODE;
+        }
+        else if (ap_cstr_casecmp(token, "Digest") == 0) {
+            bit = ETAG_DIGEST;
+        }
+        else {
+            return apr_pstrcat(cmd->pool, "Unknown keyword '",
+                               token, "' for ", cmd->cmd->name,
+                               " directive", NULL);
+        }
+
+        if (! valid) {
+            return apr_pstrcat(cmd->pool, cmd->cmd->name, " keyword '",
+                               token, "' cannot be used with '+' or '-'",
+                               NULL);
+        }
+
+        if (action == '+') {
+            /*
+             * Make sure it's in the 'add' list and absent from the
+             * 'subtract' list.
+             */
+            cfg->etag_add |= bit;
+            cfg->etag_remove &= (~ bit);
+        }
+        else if (action == '-') {
+            cfg->etag_remove |= bit;
+            cfg->etag_add &= (~ bit);
+        }
+        else {
+            /*
+             * Non-relative values wipe out any + or - values
+             * accumulated so far.
+             */
+            cfg->etag_bits |= bit;
+            cfg->etag_add = ETAG_UNSET;
+            cfg->etag_remove = ETAG_UNSET;
+            explicit = 1;
+        }
+    }
+
+    /*
+     * Any setting at all will clear the 'None' and 'Unset' bits.
+     */
+
+    if (cfg->etag_add != ETAG_UNSET) {
+        cfg->etag_add &= (~ ETAG_UNSET);
+    }
+
+    if (cfg->etag_remove != ETAG_UNSET) {
+        cfg->etag_remove &= (~ ETAG_UNSET);
+    }
+
+    if (explicit) {
+        cfg->etag_bits &= (~ ETAG_UNSET);
+
+        if ((cfg->etag_bits & ETAG_NONE) != ETAG_NONE) {
+            cfg->etag_bits &= (~ ETAG_NONE);
+        }
+    }
+
+    return NULL;
+}
+
+static const char *set_enable_mmap(cmd_parms *cmd, void *d_,
+                                   const char *arg)
+{
+    core_dir_config *d = d_;
+
+    if (ap_cstr_casecmp(arg, "on") == 0) {
+        d->enable_mmap = ENABLE_MMAP_ON;
+    }
+    else if (ap_cstr_casecmp(arg, "off") == 0) {
+        d->enable_mmap = ENABLE_MMAP_OFF;
+    }
+    else {
+        return "parameter must be 'on' or 'off'";
+    }
+
+    return NULL;
+}
+
+static const char *set_enable_sendfile(cmd_parms *cmd, void *d_,
+                                   const char *arg)
+{
+    core_dir_config *d = d_;
+
+    if (ap_cstr_casecmp(arg, "on") == 0) {
+        d->enable_sendfile = ENABLE_SENDFILE_ON;
+    }
+    else if (ap_cstr_casecmp(arg, "off") == 0) {
+        d->enable_sendfile = ENABLE_SENDFILE_OFF;
+    }
+    else {
+        return "parameter must be 'on' or 'off'";
+    }
+
+    return NULL;
+}
+
+static const char *set_read_buf_size(cmd_parms *cmd, void *d_,
+                                     const char *arg)
+{
+    core_dir_config *d = d_;
+    apr_off_t size;
+    char *end;
+
+    if (apr_strtoff(&size, arg, &end, 10)
+            || *end || size < 0 || size > APR_UINT32_MAX)
+        return apr_pstrcat(cmd->pool,
+                           "parameter must be a number between 0 and "
+                           APR_STRINGIFY(APR_UINT32_MAX) "): ",
+                           arg, NULL);
+
+    d->read_buf_size = (apr_size_t)size;
+
+    return NULL;
+}
+
+static const char *set_flush_max_threshold(cmd_parms *cmd, void *d_,
+                                           const char *arg)
+{
+    core_server_config *conf =
+        ap_get_core_module_config(cmd->server->module_config);
+    apr_off_t size;
+    char *end;
+
+    if (apr_strtoff(&size, arg, &end, 10)
+            || *end || size < 0 || size > APR_UINT32_MAX)
+        return apr_pstrcat(cmd->pool,
+                           "parameter must be a number between 0 and "
+                           APR_STRINGIFY(APR_UINT32_MAX) "): ",
+                           arg, NULL);
+
+    conf->flush_max_threshold = (apr_size_t)size;
+
+    return NULL;
+}
+
+static const char *set_flush_max_pipelined(cmd_parms *cmd, void *d_,
+                                           const char *arg)
+{
+    core_server_config *conf =
+        ap_get_core_module_config(cmd->server->module_config);
+    apr_off_t num;
+    char *end;
+
+    if (apr_strtoff(&num, arg, &end, 10)
+            || *end || num < -1 || num > APR_INT32_MAX)
+        return apr_pstrcat(cmd->pool,
+                           "parameter must be a number between -1 and "
+                           APR_STRINGIFY(APR_INT32_MAX) ": ",
+                           arg, NULL);
+
+    conf->flush_max_pipelined = (apr_int32_t)num;
+
+    return NULL;
+}
+
+/*
+ * Report a missing-'>' syntax error.
+ */
+static char *unclosed_directive(cmd_parms *cmd)
+{
+    return apr_pstrcat(cmd->pool, cmd->cmd->name,
+                       "> directive missing closing '>'", NULL);
+}
+
+/*
+ * Report a missing args in '<Foo >' syntax error.
+ */
+static char *missing_container_arg(cmd_parms *cmd)
+{
+    return apr_pstrcat(cmd->pool, cmd->cmd->name,
+                       "> directive requires additional arguments", NULL);
+}
+
+AP_CORE_DECLARE_NONSTD(const char *) ap_limit_section(cmd_parms *cmd,
+                                                      void *dummy,
+                                                      const char *arg)
+{
+    const char *endp = ap_strrchr_c(arg, '>');
+    const char *limited_methods;
+    void *tog = cmd->cmd->cmd_data;
+    apr_int64_t limited = 0;
+    apr_int64_t old_limited = cmd->limited;
+    const char *errmsg;
+
+    if (endp == NULL) {
+        return unclosed_directive(cmd);
+    }
+
+    limited_methods = apr_pstrmemdup(cmd->temp_pool, arg, endp - arg);
+
+    if (!limited_methods[0]) {
+        return missing_container_arg(cmd);
+    }
+
+    while (limited_methods[0]) {
+        char *method = ap_getword_conf(cmd->temp_pool, &limited_methods);
+        int methnum;
+
+        /* check for builtin or module registered method number */
+        methnum = ap_method_number_of(method);
+
+        if (methnum == M_TRACE && !tog) {
+            return "TRACE cannot be controlled by <Limit>, see TraceEnable";
+        }
+        else if (methnum == M_INVALID) {
+            /* method has not been registered yet, but resource restriction
+             * is always checked before method handling, so register it.
+             */
+            if (cmd->pool == cmd->temp_pool) {
+                /* In .htaccess, we can't globally register new methods. */
+                return apr_psprintf(cmd->pool, "Could not register method '%s' "
+                                   "for %s from .htaccess configuration",
+                                    method, cmd->cmd->name);
+            }
+            methnum = ap_method_register(cmd->pool,
+                                         apr_pstrdup(cmd->pool, method));
+        }
+
+        limited |= (AP_METHOD_BIT << methnum);
+    }
+
+    /* Killing two features with one function,
+     * if (tog == NULL) <Limit>, else <LimitExcept>
+     */
+    limited = tog ? ~limited : limited;
+
+    if (!(old_limited & limited)) {
+        return apr_pstrcat(cmd->pool, cmd->cmd->name,
+                           "> directive excludes all methods", NULL);
+    }
+    else if ((old_limited & limited) == old_limited) {
+        return apr_pstrcat(cmd->pool, cmd->cmd->name,
+                           "> directive specifies methods already excluded",
+                           NULL);
+    }
+
+    cmd->limited &= limited;
+
+    errmsg = ap_walk_config(cmd->directive->first_child, cmd, cmd->context);
+
+    cmd->limited = old_limited;
+
+    return errmsg;
+}
+
+/* XXX: Bogus - need to do this differently (at least OS2/Netware suffer
+ * the same problem!!!
+ * We use this in <DirectoryMatch> and <FilesMatch>, to ensure that
+ * people don't get bitten by wrong-cased regex matches
+ */
+
+#ifdef WIN32
+#define USE_ICASE AP_REG_ICASE
+#else
+#define USE_ICASE 0
+#endif
+
+static const char *dirsection(cmd_parms *cmd, void *mconfig, const char *arg)
+{
+    const char *errmsg;
+    const char *endp = ap_strrchr_c(arg, '>');
+    int old_overrides = cmd->override;
+    char *old_path = cmd->path;
+    core_dir_config *conf;
+    ap_conf_vector_t *new_dir_conf = ap_create_per_dir_config(cmd->pool);
+    ap_regex_t *r = NULL;
+    const command_rec *thiscmd = cmd->cmd;
+
+    const char *err = ap_check_cmd_context(cmd, NOT_IN_DIR_CONTEXT);
+    if (err != NULL) {
+        return err;
+    }
+
+    if (endp == NULL) {
+        return unclosed_directive(cmd);
+    }
+
+    arg = apr_pstrndup(cmd->temp_pool, arg, endp - arg);
+
+    if (!arg[0]) {
+        return missing_container_arg(cmd);
+    }
+
+    cmd->path = ap_getword_conf(cmd->pool, &arg);
+    cmd->override = OR_ALL|ACCESS_CONF;
+
+    if (!strcmp(cmd->path, "~")) {
+        cmd->path = ap_getword_conf(cmd->pool, &arg);
+        if (!cmd->path)
+            return "<Directory ~ > block must specify a path";
+        r = ap_pregcomp(cmd->pool, cmd->path, AP_REG_EXTENDED|USE_ICASE);
+        if (!r) {
+            return "Regex could not be compiled";
+        }
+    }
+    else if (thiscmd->cmd_data) { /* <DirectoryMatch> */
+        r = ap_pregcomp(cmd->pool, cmd->path, AP_REG_EXTENDED|USE_ICASE);
+        if (!r) {
+            return "Regex could not be compiled";
+        }
+    }
+    else if (strcmp(cmd->path, "/") != 0)
+    {
+        char *newpath;
+
+        /*
+         * Ensure that the pathname is canonical, and append the trailing /
+         */
+        apr_status_t rv = apr_filepath_merge(&newpath, NULL, cmd->path,
+                                             APR_FILEPATH_TRUENAME, cmd->pool);
+        if (rv != APR_SUCCESS && rv != APR_EPATHWILD) {
+            return apr_pstrcat(cmd->pool, "<Directory \"", cmd->path,
+                               "\"> path is invalid.", NULL);
+        }
+
+        cmd->path = newpath;
+        if (cmd->path[strlen(cmd->path) - 1] != '/')
+            cmd->path = apr_pstrcat(cmd->pool, cmd->path, "/", NULL);
+    }
+
+    /* initialize our config and fetch it */
+    conf = ap_set_config_vectors(cmd->server, new_dir_conf, cmd->path,
+                                 &core_module, cmd->pool);
+
+    errmsg = ap_walk_config(cmd->directive->first_child, cmd, new_dir_conf);
+    if (errmsg != NULL)
+        return errmsg;
+
+    conf->r = r;
+    conf->d = cmd->path;
+    conf->d_is_fnmatch = (apr_fnmatch_test(conf->d) != 0);
+
+    if (r) {
+        conf->refs = apr_array_make(cmd->pool, 8, sizeof(char *));
+        ap_regname(r, conf->refs, AP_REG_MATCH, 1);
+    }
+
+    /* Make this explicit - the "/" root has 0 elements, that is, we
+     * will always merge it, and it will always sort and merge first.
+     * All others are sorted and tested by the number of slashes.
+     */
+    if (strcmp(conf->d, "/") == 0)
+        conf->d_components = 0;
+    else
+        conf->d_components = ap_count_dirs(conf->d);
+
+    ap_add_per_dir_conf(cmd->server, new_dir_conf);
+
+    if (*arg != '\0') {
+        return apr_pstrcat(cmd->pool, "Multiple ", thiscmd->name,
+                           "> arguments not (yet) supported.", NULL);
+    }
+
+    cmd->path = old_path;
+    cmd->override = old_overrides;
+
+    return NULL;
+}
+
+static const char *urlsection(cmd_parms *cmd, void *mconfig, const char *arg)
+{
+    const char *errmsg;
+    const char *endp = ap_strrchr_c(arg, '>');
+    int old_overrides = cmd->override;
+    char *old_path = cmd->path;
+    core_dir_config *conf;
+    ap_regex_t *r = NULL;
+    const command_rec *thiscmd = cmd->cmd;
+    ap_conf_vector_t *new_url_conf = ap_create_per_dir_config(cmd->pool);
+    const char *err = ap_check_cmd_context(cmd, NOT_IN_DIR_CONTEXT);
+    if (err != NULL) {
+        return err;
+    }
+
+    if (endp == NULL) {
+        return unclosed_directive(cmd);
+    }
+
+    arg = apr_pstrndup(cmd->temp_pool, arg, endp - arg);
+
+    if (!arg[0]) {
+        return missing_container_arg(cmd);
+    }
+
+    cmd->path = ap_getword_conf(cmd->pool, &arg);
+    cmd->override = OR_ALL|ACCESS_CONF;
+
+    if (thiscmd->cmd_data) { /* <LocationMatch> */
+        r = ap_pregcomp(cmd->pool, cmd->path, AP_REG_EXTENDED);
+        if (!r) {
+            return "Regex could not be compiled";
+        }
+    }
+    else if (!strcmp(cmd->path, "~")) {
+        cmd->path = ap_getword_conf(cmd->pool, &arg);
+        r = ap_pregcomp(cmd->pool, cmd->path, AP_REG_EXTENDED);
+        if (!r) {
+            return "Regex could not be compiled";
+        }
+    }
+
+    /* initialize our config and fetch it */
+    conf = ap_set_config_vectors(cmd->server, new_url_conf, cmd->path,
+                                 &core_module, cmd->pool);
+
+    errmsg = ap_walk_config(cmd->directive->first_child, cmd, new_url_conf);
+    if (errmsg != NULL)
+        return errmsg;
+
+    conf->d = apr_pstrdup(cmd->pool, cmd->path);     /* No mangling, please */
+    conf->d_is_fnmatch = apr_fnmatch_test(conf->d) != 0;
+    conf->r = r;
+
+    if (r) {
+        conf->refs = apr_array_make(cmd->pool, 8, sizeof(char *));
+        ap_regname(r, conf->refs, AP_REG_MATCH, 1);
+    }
+
+    ap_add_per_url_conf(cmd->server, new_url_conf);
+
+    if (*arg != '\0') {
+        return apr_pstrcat(cmd->pool, "Multiple ", thiscmd->name,
+                           "> arguments not (yet) supported.", NULL);
+    }
+
+    cmd->path = old_path;
+    cmd->override = old_overrides;
+
+    return NULL;
+}
+
+static const char *filesection(cmd_parms *cmd, void *mconfig, const char *arg)
+{
+    const char *errmsg;
+    const char *endp = ap_strrchr_c(arg, '>');
+    int old_overrides = cmd->override;
+    char *old_path = cmd->path;
+    core_dir_config *conf;
+    ap_regex_t *r = NULL;
+    const command_rec *thiscmd = cmd->cmd;
+    ap_conf_vector_t *new_file_conf = ap_create_per_dir_config(cmd->pool);
+    const char *err = ap_check_cmd_context(cmd,
+                                           NOT_IN_LOCATION | NOT_IN_LIMIT);
+
+    if (err != NULL) {
+        return err;
+    }
+
+    if (endp == NULL) {
+        return unclosed_directive(cmd);
+    }
+
+    arg = apr_pstrndup(cmd->temp_pool, arg, endp - arg);
+
+    if (!arg[0]) {
+        return missing_container_arg(cmd);
+    }
+
+    cmd->path = ap_getword_conf(cmd->pool, &arg);
+    /* Only if not an .htaccess file */
+    if (!old_path) {
+        cmd->override = OR_ALL|ACCESS_CONF;
+    }
+
+    if (thiscmd->cmd_data) { /* <FilesMatch> */
+        r = ap_pregcomp(cmd->pool, cmd->path, AP_REG_EXTENDED|USE_ICASE);
+        if (!r) {
+            return "Regex could not be compiled";
+        }
+    }
+    else if (!strcmp(cmd->path, "~")) {
+        cmd->path = ap_getword_conf(cmd->pool, &arg);
+        r = ap_pregcomp(cmd->pool, cmd->path, AP_REG_EXTENDED|USE_ICASE);
+        if (!r) {
+            return "Regex could not be compiled";
+        }
+    }
+    else {
+        char *newpath;
+        /* Ensure that the pathname is canonical, but we
+         * can't test the case/aliases without a fixed path */
+        if (apr_filepath_merge(&newpath, "", cmd->path,
+                               0, cmd->pool) != APR_SUCCESS)
+                return apr_pstrcat(cmd->pool, "<Files \"", cmd->path,
+                               "\"> is invalid.", NULL);
+        cmd->path = newpath;
+    }
+
+    /* initialize our config and fetch it */
+    conf = ap_set_config_vectors(cmd->server, new_file_conf, cmd->path,
+                                 &core_module, cmd->pool);
+
+    errmsg = ap_walk_config(cmd->directive->first_child, cmd, new_file_conf);
+    if (errmsg != NULL)
+        return errmsg;
+
+    conf->d = cmd->path;
+    conf->d_is_fnmatch = apr_fnmatch_test(conf->d) != 0;
+    conf->r = r;
+
+    if (r) {
+        conf->refs = apr_array_make(cmd->pool, 8, sizeof(char *));
+        ap_regname(r, conf->refs, AP_REG_MATCH, 1);
+    }
+
+    ap_add_file_conf(cmd->pool, (core_dir_config *)mconfig, new_file_conf);
+
+    if (*arg != '\0') {
+        return apr_pstrcat(cmd->pool, "Multiple ", thiscmd->name,
+                           "> arguments not (yet) supported.", NULL);
+    }
+
+    cmd->path = old_path;
+    cmd->override = old_overrides;
+
+    return NULL;
+}
+
+#define COND_IF      ((void *)1)
+#define COND_ELSE    ((void *)2)
+#define COND_ELSEIF  ((void *)3)
+
+static const char *ifsection(cmd_parms *cmd, void *mconfig, const char *arg)
+{
+    const char *errmsg;
+    const char *endp = ap_strrchr_c(arg, '>');
+    int old_overrides = cmd->override;
+    char *old_path = cmd->path;
+    core_dir_config *conf;
+    const command_rec *thiscmd = cmd->cmd;
+    ap_conf_vector_t *new_if_conf = ap_create_per_dir_config(cmd->pool);
+    const char *err = ap_check_cmd_context(cmd, NOT_IN_LIMIT);
+    const char *condition;
+    const char *expr_err;
+
+    if (err != NULL) {
+        return err;
+    }
+
+    if (endp == NULL) {
+        return unclosed_directive(cmd);
+    }
+
+    arg = apr_pstrndup(cmd->temp_pool, arg, endp - arg);
+
+    /*
+     * Set a dummy value so that other directives notice that they are inside
+     * a config section.
+     */
+    cmd->path = "*If";
+    /* Only if not an .htaccess file */
+    if (!old_path) {
+        cmd->override = OR_ALL|ACCESS_CONF;
+    }
+
+    /* initialize our config and fetch it */
+    conf = ap_set_config_vectors(cmd->server, new_if_conf, cmd->path,
+                                 &core_module, cmd->pool);
+
+    if (cmd->cmd->cmd_data == COND_IF)
+        conf->condition_ifelse = AP_CONDITION_IF;
+    else if (cmd->cmd->cmd_data == COND_ELSEIF)
+        conf->condition_ifelse = AP_CONDITION_ELSEIF;
+    else if (cmd->cmd->cmd_data == COND_ELSE)
+        conf->condition_ifelse = AP_CONDITION_ELSE;
+    else
+        ap_assert(0);
+
+    if (conf->condition_ifelse == AP_CONDITION_ELSE) {
+        if (arg[0])
+            return "<Else> does not take an argument";
+    }
+    else {
+        if (!arg[0])
+            return missing_container_arg(cmd);
+        condition = ap_getword_conf(cmd->pool, &arg);
+        conf->condition = ap_expr_parse_cmd(cmd, condition, 0, &expr_err, NULL);
+        if (expr_err)
+            return apr_psprintf(cmd->pool, "Cannot parse condition clause: %s",
+                                expr_err);
+    }
+
+    errmsg = ap_walk_config(cmd->directive->first_child, cmd, new_if_conf);
+    if (errmsg != NULL)
+        return errmsg;
+
+    conf->d = cmd->path;
+    conf->d_is_fnmatch = 0;
+    conf->r = NULL;
+
+    errmsg = ap_add_if_conf(cmd->pool, (core_dir_config *)mconfig, new_if_conf);
+    if (errmsg != NULL)
+        return errmsg;
+
+    if (*arg != '\0') {
+        return apr_pstrcat(cmd->pool, "Multiple ", thiscmd->name,
+                           "> arguments not supported.", NULL);
+    }
+
+    cmd->path = old_path;
+    cmd->override = old_overrides;
+
+    return NULL;
+}
+
+static module *find_module(server_rec *s, const char *name)
+{
+    module *found = ap_find_linked_module(name);
+
+    /* search prelinked stuff */
+    if (!found) {
+        ap_module_symbol_t *current = ap_prelinked_module_symbols;
+
+        for (; current->name; ++current) {
+            if (!strcmp(current->name, name)) {
+                found = current->modp;
+                break;
+            }
+        }
+    }
+
+    /* search dynamic stuff */
+    if (!found) {
+        APR_OPTIONAL_FN_TYPE(ap_find_loaded_module_symbol) *check_symbol =
+            APR_RETRIEVE_OPTIONAL_FN(ap_find_loaded_module_symbol);
+
+        if (check_symbol) {
+            /*
+             * There are two phases where calling ap_find_loaded_module_symbol
+             * is problematic:
+             *
+             * During reading of the config, ap_server_conf is invalid but s
+             * points to the main server config, if passed from cmd->server
+             * of an EXEC_ON_READ directive.
+             *
+             * During config parsing, s may be a virtual host that would cause
+             * a segfault in mod_so if passed to ap_find_loaded_module_symbol,
+             * because mod_so's server config for vhosts is initialized later.
+             * But ap_server_conf is already set at this time.
+             *
+             * Therefore we use s if it is not virtual and ap_server_conf if
+             * s is virtual.
+             */
+            found = check_symbol(s->is_virtual ? ap_server_conf : s, name);
+        }
+    }
+
+    return found;
+}
+
+/* Callback function type used by start_cond_section. */
+typedef int (*test_cond_section_fn)(cmd_parms *cmd, const char *arg);
+
+/* Implementation of <IfXXXXX>-style conditional sections.  Callback
+ * to test condition must be in cmd->info, matching function type
+ * test_cond_section_fn. */
+static const char *start_cond_section(cmd_parms *cmd, void *mconfig, const char *arg)
+{
+    const char *endp = ap_strrchr_c(arg, '>');
+    int result, not = (arg[0] == '!');
+    test_cond_section_fn testfn = (test_cond_section_fn)cmd->info;
+    const char *arg1;
+
+    if (endp == NULL) {
+        return unclosed_directive(cmd);
+    }
+
+    arg = apr_pstrmemdup(cmd->temp_pool, arg, endp - arg);
+
+    if (not) {
+        arg++;
+    }
+
+    arg1 = ap_getword_conf(cmd->temp_pool, &arg);
+
+    if (!arg1[0]) {
+        return missing_container_arg(cmd);
+    }
+
+    result = testfn(cmd, arg1);
+
+    if ((!not && result) || (not && !result)) {
+        ap_directive_t *parent = NULL;
+        ap_directive_t *current = NULL;
+        const char *retval;
+
+        retval = ap_build_cont_config(cmd->pool, cmd->temp_pool, cmd,
+                                      &current, &parent, (char *)cmd->cmd->name);
+        *(ap_directive_t **)mconfig = current;
+        return retval;
+    }
+    else {
+        *(ap_directive_t **)mconfig = NULL;
+        return ap_soak_end_container(cmd, (char *)cmd->cmd->name);
+    }
+}
+
+/* Callback to implement <IfModule> test for start_cond_section. */
+static int test_ifmod_section(cmd_parms *cmd, const char *arg)
+{
+    return find_module(cmd->server, arg) != NULL;
+}
+
+AP_DECLARE(int) ap_exists_config_define(const char *name)
+{
+    return ap_array_str_contains(ap_server_config_defines, name);
+}
+
+static int test_ifdefine_section(cmd_parms *cmd, const char *arg)
+{
+    return ap_exists_config_define(arg);
+}
+
+static int test_iffile_section(cmd_parms *cmd, const char *arg)
+{
+    const char *relative;
+    apr_finfo_t sb;
+
+    /*
+     * At least on Windows, if the path we are testing is not valid (for example
+     * a path on a USB key that is not plugged), 'ap_server_root_relative()' will
+     * return NULL. In such a case, consider that the file is not there and that
+     * the section should be skipped.
+     */
+    relative = ap_server_root_relative(cmd->temp_pool, arg);
+    return (relative &&
+           (apr_stat(&sb, relative, APR_FINFO_TYPE, cmd->temp_pool) == APR_SUCCESS));
+}
+
+static int test_ifdirective_section(cmd_parms *cmd, const char *arg)
+{
+    return ap_exists_directive(cmd->temp_pool, arg);
+}
+
+static int test_ifsection_section(cmd_parms *cmd, const char *arg)
+{
+    const char *name = apr_pstrcat(cmd->temp_pool, "<", arg, NULL);
+    return ap_exists_directive(cmd->temp_pool, name);
+}
+
+/* httpd.conf commands... beginning with the <VirtualHost> business */
+
+static const char *virtualhost_section(cmd_parms *cmd, void *dummy,
+                                       const char *arg)
+{
+    server_rec *main_server = cmd->server, *s;
+    const char *errmsg;
+    const char *endp = ap_strrchr_c(arg, '>');
+    apr_pool_t *p = cmd->pool;
+
+    const char *err = ap_check_cmd_context(cmd, GLOBAL_ONLY);
+    if (err != NULL) {
+        return err;
+    }
+
+    if (endp == NULL) {
+        return unclosed_directive(cmd);
+    }
+
+    arg = apr_pstrndup(cmd->temp_pool, arg, endp - arg);
+
+    if (!arg[0]) {
+        return missing_container_arg(cmd);
+    }
+
+    /* FIXME: There's another feature waiting to happen here -- since you
+        can now put multiple addresses/names on a single <VirtualHost>
+        you might want to use it to group common definitions and then
+        define other "subhosts" with their individual differences.  But
+        personally I'd rather just do it with a macro preprocessor. -djg */
+    if (main_server->is_virtual) {
+        return "<VirtualHost> doesn't nest!";
+    }
+
+    errmsg = ap_init_virtual_host(p, arg, main_server, &s);
+    if (errmsg) {
+        return errmsg;
+    }
+
+    s->next = main_server->next;
+    main_server->next = s;
+
+    s->defn_name = cmd->directive->filename;
+    s->defn_line_number = cmd->directive->line_num;
+
+    cmd->server = s;
+
+    errmsg = ap_walk_config(cmd->directive->first_child, cmd,
+                            s->lookup_defaults);
+
+    cmd->server = main_server;
+
+    return errmsg;
+}
+
+static const char *set_regex_default_options(cmd_parms *cmd,
+                                             void *dummy,
+                                             const char *arg)
+{
+    const command_rec *thiscmd = cmd->cmd;
+    int cflags, cflag;
+
+    const char *err = ap_check_cmd_context(cmd, GLOBAL_ONLY);
+    if (err != NULL) {
+        return err;
+    }
+
+    cflags = ap_regcomp_get_default_cflags();
+    while (*arg) {
+        const char *name = ap_getword_conf(cmd->pool, &arg);
+        int how = 0;
+
+        if (strcasecmp(name, "none") == 0) {
+            cflags = 0;
+            continue;
+        }
+
+        if (*name == '+') {
+            name++;
+            how = +1;
+        }
+        else if (*name == '-') {
+            name++;
+            how = -1;
+        }
+
+        cflag = ap_regcomp_default_cflag_by_name(name);
+        if (!cflag) {
+            return apr_psprintf(cmd->pool, "%s: option '%s' unknown",
+                                thiscmd->name, name);
+        }
+
+        if (how > 0) {
+            cflags |= cflag;
+        }
+        else if (how < 0) {
+            cflags &= ~cflag;
+        }
+        else {
+            cflags = cflag;
+        }
+    }
+    ap_regcomp_set_default_cflags(cflags);
+
+    return NULL;
+}
+
+static const char *set_server_alias(cmd_parms *cmd, void *dummy,
+                                    const char *arg)
+{
+    if (!cmd->server->names) {
+        return "ServerAlias only used in <VirtualHost>";
+    }
+
+    while (*arg) {
+        char **item, *name = ap_getword_conf(cmd->pool, &arg);
+
+        if (ap_is_matchexp(name)) {
+            item = (char **)apr_array_push(cmd->server->wild_names);
+        }
+        else {
+            item = (char **)apr_array_push(cmd->server->names);
+        }
+
+        *item = name;
+    }
+
+    return NULL;
+}
+
+static const char *set_accf_map(cmd_parms *cmd, void *dummy,
+                                const char *iproto, const char* iaccf)
+{
+    const char *err = ap_check_cmd_context(cmd, GLOBAL_ONLY);
+    core_server_config *conf =
+        ap_get_core_module_config(cmd->server->module_config);
+    char* proto;
+    char* accf;
+    if (err != NULL) {
+        return err;
+    }
+
+    proto = apr_pstrdup(cmd->pool, iproto);
+    ap_str_tolower(proto);
+    accf = apr_pstrdup(cmd->pool, iaccf);
+    ap_str_tolower(accf);
+    apr_table_setn(conf->accf_map, proto, accf);
+
+    return NULL;
+}
+
+AP_DECLARE(const char*) ap_get_server_protocol(server_rec* s)
+{
+    core_server_config *conf = ap_get_core_module_config(s->module_config);
+    return conf->protocol;
+}
+
+AP_DECLARE(void) ap_set_server_protocol(server_rec* s, const char* proto)
+{
+    core_server_config *conf = ap_get_core_module_config(s->module_config);
+    conf->protocol = proto;
+}
+
+static const char *set_protocol(cmd_parms *cmd, void *dummy,
+                                const char *arg)
+{
+    const char *err = ap_check_cmd_context(cmd, NOT_IN_DIR_CONTEXT);
+    core_server_config *conf =
+        ap_get_core_module_config(cmd->server->module_config);
+    char* proto;
+
+    if (err != NULL) {
+        return err;
+    }
+
+    proto = apr_pstrdup(cmd->pool, arg);
+    ap_str_tolower(proto);
+    conf->protocol = proto;
+
+    return NULL;
+}
+
+static const char *set_server_string_slot(cmd_parms *cmd, void *dummy,
+                                          const char *arg)
+{
+    /* This one's pretty generic... */
+
+    int offset = (int)(long)cmd->info;
+    char *struct_ptr = (char *)cmd->server;
+
+    const char *err = ap_check_cmd_context(cmd, NOT_IN_DIR_CONTEXT);
+    if (err != NULL) {
+        return err;
+    }
+
+    *(const char **)(struct_ptr + offset) = arg;
+    return NULL;
+}
+
+/*
+ * The ServerName directive takes one argument with format
+ * [scheme://]fully-qualified-domain-name[:port], for instance
+ * ServerName www.example.com
+ * ServerName www.example.com:80
+ * ServerName https://www.example.com:443
+ */
+
+static const char *server_hostname_port(cmd_parms *cmd, void *dummy, const char *arg)
+{
+    const char *err = ap_check_cmd_context(cmd, NOT_IN_DIR_CONTEXT);
+    const char *portstr, *part;
+    char *scheme;
+    int port;
+
+    if (err != NULL) {
+        return err;
+    }
+
+    if (apr_fnmatch_test(arg))
+        return apr_pstrcat(cmd->temp_pool, "Invalid ServerName \"", arg,
+                "\" use ServerAlias to set multiple server names.", NULL);
+
+    part = ap_strstr_c(arg, "://");
+
+    if (part) {
+      scheme = apr_pstrndup(cmd->pool, arg, part - arg);
+      ap_str_tolower(scheme);
+      cmd->server->server_scheme = (const char *)scheme;
+      part += 3;
+    } else {
+      part = arg;
+    }
+
+    portstr = ap_strchr_c(part, ':');
+    if (portstr) {
+        cmd->server->server_hostname = apr_pstrndup(cmd->pool, part,
+                                                    portstr - part);
+        portstr++;
+        port = atoi(portstr);
+        if (port <= 0 || port >= 65536) { /* 65536 == 1<<16 */
+            return apr_pstrcat(cmd->temp_pool, "The port number \"", arg,
+                          "\" is outside the appropriate range "
+                          "(i.e., 1..65535).", NULL);
+        }
+    }
+    else {
+        cmd->server->server_hostname = apr_pstrdup(cmd->pool, part);
+        port = 0;
+    }
+
+    cmd->server->port = port;
+    return NULL;
+}
+
+static const char *set_signature_flag(cmd_parms *cmd, void *d_,
+                                      const char *arg)
+{
+    core_dir_config *d = d_;
+
+    if (ap_cstr_casecmp(arg, "On") == 0) {
+        d->server_signature = srv_sig_on;
+    }
+    else if (ap_cstr_casecmp(arg, "Off") == 0) {
+        d->server_signature = srv_sig_off;
+    }
+    else if (ap_cstr_casecmp(arg, "EMail") == 0) {
+        d->server_signature = srv_sig_withmail;
+    }
+    else {
+        return "ServerSignature: use one of: off | on | email";
+    }
+
+    return NULL;
+}
+
+static const char *set_server_root(cmd_parms *cmd, void *dummy,
+                                   const char *arg)
+{
+    const char *err = ap_check_cmd_context(cmd, GLOBAL_ONLY);
+
+    if (err != NULL) {
+        return err;
+    }
+
+    if ((apr_filepath_merge((char**)&ap_server_root, NULL, arg,
+                            APR_FILEPATH_TRUENAME, cmd->pool) != APR_SUCCESS)
+        || !ap_is_directory(cmd->temp_pool, ap_server_root)) {
+        return "ServerRoot must be a valid directory";
+    }
+
+    return NULL;
+}
+
+static const char *set_runtime_dir(cmd_parms *cmd, void *dummy, const char *arg)
+{
+    const char *err = ap_check_cmd_context(cmd, GLOBAL_ONLY);
+
+    if (err != NULL) {
+        return err;
+    }
+
+    if ((apr_filepath_merge((char**)&ap_runtime_dir, NULL,
+                            ap_server_root_relative(cmd->temp_pool, arg),
+                            APR_FILEPATH_TRUENAME, cmd->pool) != APR_SUCCESS)
+        || !ap_is_directory(cmd->temp_pool, ap_runtime_dir)) {
+        return "DefaultRuntimeDir must be a valid directory, absolute or relative to ServerRoot";
+    }
+
+    return NULL;
+}
+
+static const char *set_timeout(cmd_parms *cmd, void *dummy, const char *arg)
+{
+    const char *err = ap_check_cmd_context(cmd, NOT_IN_DIR_CONTEXT);
+
+    if (err != NULL) {
+        return err;
+    }
+
+    cmd->server->timeout = apr_time_from_sec(atoi(arg));
+    return NULL;
+}
+
+static const char *set_allow2f(cmd_parms *cmd, void *d_, const char *arg)
+{
+    core_dir_config *d = d_;
+
+    if (0 == ap_cstr_casecmp(arg, "on")) {
+        d->allow_encoded_slashes = 1;
+        d->decode_encoded_slashes = 1; /* for compatibility with 2.0 & 2.2 */
+    } else if (0 == ap_cstr_casecmp(arg, "off")) {
+        d->allow_encoded_slashes = 0;
+        d->decode_encoded_slashes = 0;
+    } else if (0 == ap_cstr_casecmp(arg, "nodecode")) {
+        d->allow_encoded_slashes = 1;
+        d->decode_encoded_slashes = 0;
+    } else {
+        return apr_pstrcat(cmd->pool,
+                           cmd->cmd->name, " must be On, Off, or NoDecode",
+                           NULL);
+    }
+    return NULL;
+}
+
+static const char *set_hostname_lookups(cmd_parms *cmd, void *d_,
+                                        const char *arg)
+{
+    core_dir_config *d = d_;
+
+    if (!ap_cstr_casecmp(arg, "on")) {
+        d->hostname_lookups = HOSTNAME_LOOKUP_ON;
+    }
+    else if (!ap_cstr_casecmp(arg, "off")) {
+        d->hostname_lookups = HOSTNAME_LOOKUP_OFF;
+    }
+    else if (!ap_cstr_casecmp(arg, "double")) {
+        d->hostname_lookups = HOSTNAME_LOOKUP_DOUBLE;
+    }
+    else {
+        return "parameter must be 'on', 'off', or 'double'";
+    }
+
+    return NULL;
+}
+
+static const char *set_serverpath(cmd_parms *cmd, void *dummy,
+                                  const char *arg)
+{
+    const char *err = ap_check_cmd_context(cmd, NOT_IN_DIR_CONTEXT);
+
+    if (err != NULL) {
+        return err;
+    }
+
+    cmd->server->path = arg;
+    cmd->server->pathlen = (int)strlen(arg);
+    return NULL;
+}
+
+static const char *set_content_md5(cmd_parms *cmd, void *d_, int arg)
+{
+    core_dir_config *d = d_;
+
+    d->content_md5 = arg ? AP_CONTENT_MD5_ON : AP_CONTENT_MD5_OFF;
+    return NULL;
+}
+
+static const char *set_accept_path_info(cmd_parms *cmd, void *d_, const char *arg)
+{
+    core_dir_config *d = d_;
+
+    if (ap_cstr_casecmp(arg, "on") == 0) {
+        d->accept_path_info = AP_REQ_ACCEPT_PATH_INFO;
+    }
+    else if (ap_cstr_casecmp(arg, "off") == 0) {
+        d->accept_path_info = AP_REQ_REJECT_PATH_INFO;
+    }
+    else if (ap_cstr_casecmp(arg, "default") == 0) {
+        d->accept_path_info = AP_REQ_DEFAULT_PATH_INFO;
+    }
+    else {
+        return "AcceptPathInfo must be set to on, off or default";
+    }
+
+    return NULL;
+}
+
+static const char *set_use_canonical_name(cmd_parms *cmd, void *d_,
+                                          const char *arg)
+{
+    core_dir_config *d = d_;
+
+    if (ap_cstr_casecmp(arg, "on") == 0) {
+        d->use_canonical_name = USE_CANONICAL_NAME_ON;
+    }
+    else if (ap_cstr_casecmp(arg, "off") == 0) {
+        d->use_canonical_name = USE_CANONICAL_NAME_OFF;
+    }
+    else if (ap_cstr_casecmp(arg, "dns") == 0) {
+        d->use_canonical_name = USE_CANONICAL_NAME_DNS;
+    }
+    else {
+        return "parameter must be 'on', 'off', or 'dns'";
+    }
+
+    return NULL;
+}
+
+static const char *set_use_canonical_phys_port(cmd_parms *cmd, void *d_,
+                                          const char *arg)
+{
+    core_dir_config *d = d_;
+
+    if (ap_cstr_casecmp(arg, "on") == 0) {
+        d->use_canonical_phys_port = USE_CANONICAL_PHYS_PORT_ON;
+    }
+    else if (ap_cstr_casecmp(arg, "off") == 0) {
+        d->use_canonical_phys_port = USE_CANONICAL_PHYS_PORT_OFF;
+    }
+    else {
+        return "parameter must be 'on' or 'off'";
+    }
+
+    return NULL;
+}
+
+static const char *include_config (cmd_parms *cmd, void *dummy,
+                                   const char *name)
+{
+    ap_directive_t *conftree = NULL;
+    const char *conffile, *error;
+    unsigned *recursion;
+    int optional = cmd->cmd->cmd_data ? 1 : 0;
+    void *data;
+
+    /* NOTE: ap_include_sentinel is also used by ap_process_resource_config()
+     * during DUMP_INCLUDES; don't change its type or remove it without updating
+     * the other.
+     */
+    apr_pool_userdata_get(&data, "ap_include_sentinel", cmd->pool);
+    if (data) {
+        recursion = data;
+    }
+    else {
+        data = recursion = apr_palloc(cmd->pool, sizeof(*recursion));
+        *recursion = 0;
+        apr_pool_userdata_setn(data, "ap_include_sentinel", NULL, cmd->pool);
+    }
+
+    if (++*recursion > AP_MAX_INCLUDE_DEPTH) {
+        *recursion = 0;
+        return apr_psprintf(cmd->pool, "Exceeded maximum include depth of %u, "
+                            "There appears to be a recursion.",
+                            AP_MAX_INCLUDE_DEPTH);
+    }
+
+    conffile = ap_server_root_relative(cmd->pool, name);
+    if (!conffile) {
+        *recursion = 0;
+        return apr_pstrcat(cmd->pool, "Invalid Include path ",
+                           name, NULL);
+    }
+
+    if (ap_exists_config_define("DUMP_INCLUDES")) {
+        unsigned *line_number;
+
+        /* NOTE: ap_include_lineno is used by ap_process_resource_config()
+         * during DUMP_INCLUDES; don't change its type or remove it without
+         * updating the other.
+         */
+        apr_pool_userdata_get(&data, "ap_include_lineno", cmd->pool);
+        if (data) {
+            line_number = data;
+        } else {
+            data = line_number = apr_palloc(cmd->pool, sizeof(*line_number));
+            apr_pool_userdata_setn(data, "ap_include_lineno", NULL, cmd->pool);
+        }
+
+        *line_number = cmd->config_file->line_number;
+    }
+
+    error = ap_process_fnmatch_configs(cmd->server, conffile, &conftree,
+                                       cmd->pool, cmd->temp_pool,
+                                       optional);
+    if (error) {
+        *recursion = 0;
+        return error;
+    }
+
+    *(ap_directive_t **)dummy = conftree;
+
+    /* recursion level done */
+    if (*recursion) {
+        --*recursion;
+    }
+
+    return NULL;
+}
+
+static const char *set_loglevel(cmd_parms *cmd, void *config_, const char *arg_)
+{
+    char *level_str;
+    int level;
+    module *module;
+    char *arg = apr_pstrdup(cmd->temp_pool, arg_);
+    struct ap_logconf *log;
+    const char *err;
+
+    if (cmd->path) {
+        core_dir_config *dconf = config_;
+        if (!dconf->log) {
+            dconf->log = ap_new_log_config(cmd->pool, NULL);
+        }
+        log = dconf->log;
+    }
+    else {
+        log = &cmd->server->log;
+    }
+
+    if (arg == NULL)
+        return "LogLevel requires level keyword or module loglevel specifier";
+
+    level_str = ap_strrchr(arg, ':');
+
+    if (level_str == NULL) {
+        err = ap_parse_log_level(arg, &log->level);
+        if (err != NULL)
+            return err;
+        ap_reset_module_loglevels(log, APLOG_NO_MODULE);
+        ap_log_error(APLOG_MARK, APLOG_TRACE3, 0, cmd->server,
+                     "Setting LogLevel for all modules to %s", arg);
+        return NULL;
+    }
+
+    *level_str++ = '\0';
+    if (!*level_str) {
+        return apr_psprintf(cmd->temp_pool, "Module specifier '%s' must be "
+                            "followed by a log level keyword", arg);
+    }
+
+    err = ap_parse_log_level(level_str, &level);
+    if (err != NULL)
+        return apr_psprintf(cmd->temp_pool, "%s:%s: %s", arg, level_str, err);
+
+    if ((module = find_module(cmd->server, arg)) == NULL) {
+        char *name = apr_psprintf(cmd->temp_pool, "%s_module", arg);
+        ap_log_error(APLOG_MARK, APLOG_TRACE6, 0, cmd->server,
+                     "Cannot find module '%s', trying '%s'", arg, name);
+        module = find_module(cmd->server, name);
+    }
+
+    if (module == NULL) {
+        return apr_psprintf(cmd->temp_pool, "Cannot find module %s", arg);
+    }
+
+    ap_set_module_loglevel(cmd->pool, log, module->module_index, level);
+    ap_log_error(APLOG_MARK, APLOG_TRACE3, 0, cmd->server,
+                 "Setting LogLevel for module %s to %s", module->name,
+                 level_str);
+
+    return NULL;
+}
+
+AP_DECLARE(const char *) ap_psignature(const char *prefix, request_rec *r)
+{
+    char sport[20];
+    core_dir_config *conf;
+
+    conf = (core_dir_config *)ap_get_core_module_config(r->per_dir_config);
+    if ((conf->server_signature == srv_sig_off)
+            || (conf->server_signature == srv_sig_unset)) {
+        return "";
+    }
+
+    apr_snprintf(sport, sizeof sport, "%u", (unsigned) ap_get_server_port(r));
+
+    if (conf->server_signature == srv_sig_withmail) {
+        return apr_pstrcat(r->pool, prefix, "<address>",
+                           ap_get_server_banner(),
+                           " Server at <a href=\"",
+                           ap_is_url(r->server->server_admin) ? "" : "mailto:",
+                           ap_escape_html(r->pool, r->server->server_admin),
+                           "\">",
+                           ap_escape_html(r->pool, ap_get_server_name(r)),
+                           "</a> Port ", sport,
+                           "</address>\n", NULL);
+    }
+
+    return apr_pstrcat(r->pool, prefix, "<address>", ap_get_server_banner(),
+                       " Server at ",
+                       ap_escape_html(r->pool, ap_get_server_name(r)),
+                       " Port ", sport,
+                       "</address>\n", NULL);
+}
+
+/*
+ * Handle a request to include the server's OS platform in the Server
+ * response header field (the ServerTokens directive).  Unfortunately
+ * this requires a new global in order to communicate the setting back to
+ * http_main so it can insert the information in the right place in the
+ * string.
+ */
+
+static char *server_banner = NULL;
+static int banner_locked = 0;
+static const char *server_description = NULL;
+
+enum server_token_type {
+    SrvTk_MAJOR,         /* eg: Apache/2 */
+    SrvTk_MINOR,         /* eg. Apache/2.0 */
+    SrvTk_MINIMAL,       /* eg: Apache/2.0.41 */
+    SrvTk_OS,            /* eg: Apache/2.0.41 (UNIX) */
+    SrvTk_FULL,          /* eg: Apache/2.0.41 (UNIX) PHP/4.2.2 FooBar/1.2b */
+    SrvTk_PRODUCT_ONLY   /* eg: Apache */
+};
+static enum server_token_type ap_server_tokens = SrvTk_FULL;
+
+static apr_status_t reset_banner(void *dummy)
+{
+    banner_locked = 0;
+    ap_server_tokens = SrvTk_FULL;
+    server_banner = NULL;
+    server_description = NULL;
+    return APR_SUCCESS;
+}
+
+AP_DECLARE(void) ap_get_server_revision(ap_version_t *version)
+{
+    version->major = AP_SERVER_MAJORVERSION_NUMBER;
+    version->minor = AP_SERVER_MINORVERSION_NUMBER;
+    version->patch = AP_SERVER_PATCHLEVEL_NUMBER;
+    version->add_string = AP_SERVER_ADD_STRING;
+}
+
+AP_DECLARE(const char *) ap_get_server_description(void)
+{
+    return server_description ? server_description :
+        AP_SERVER_BASEVERSION " (" PLATFORM ")";
+}
+
+AP_DECLARE(const char *) ap_get_server_banner(void)
+{
+    return server_banner ? server_banner : AP_SERVER_BASEVERSION;
+}
+
+AP_DECLARE(void) ap_add_version_component(apr_pool_t *pconf, const char *component)
+{
+    if (! banner_locked) {
+        /*
+         * If the version string is null, register our cleanup to reset the
+         * pointer on pool destruction. We also know that, if NULL,
+         * we are adding the original SERVER_BASEVERSION string.
+         */
+        if (server_banner == NULL) {
+            apr_pool_cleanup_register(pconf, NULL, reset_banner,
+                                      apr_pool_cleanup_null);
+            server_banner = apr_pstrdup(pconf, component);
+        }
+        else {
+            /*
+             * Tack the given component identifier to the end of
+             * the existing string.
+             */
+            server_banner = apr_pstrcat(pconf, server_banner, " ",
+                                        component, NULL);
+        }
+    }
+    server_description = apr_pstrcat(pconf, server_description, " ",
+                                     component, NULL);
+}
+
+/*
+ * This routine adds the real server base identity to the banner string,
+ * and then locks out changes until the next reconfig.
+ */
+static void set_banner(apr_pool_t *pconf)
+{
+    if (ap_server_tokens == SrvTk_PRODUCT_ONLY) {
+        ap_add_version_component(pconf, AP_SERVER_BASEPRODUCT);
+    }
+    else if (ap_server_tokens == SrvTk_MINIMAL) {
+        ap_add_version_component(pconf, AP_SERVER_BASEVERSION);
+    }
+    else if (ap_server_tokens == SrvTk_MINOR) {
+        ap_add_version_component(pconf, AP_SERVER_BASEPRODUCT "/" AP_SERVER_MINORREVISION);
+    }
+    else if (ap_server_tokens == SrvTk_MAJOR) {
+        ap_add_version_component(pconf, AP_SERVER_BASEPRODUCT "/" AP_SERVER_MAJORVERSION);
+    }
+    else {
+        ap_add_version_component(pconf, AP_SERVER_BASEVERSION " (" PLATFORM ")");
+    }
+
+    /*
+     * Lock the server_banner string if we're not displaying
+     * the full set of tokens
+     */
+    if (ap_server_tokens != SrvTk_FULL) {
+        banner_locked++;
+    }
+    server_description = AP_SERVER_BASEVERSION " (" PLATFORM ")";
+}
+
+static const char *set_serv_tokens(cmd_parms *cmd, void *dummy,
+                                   const char *arg)
+{
+    const char *err = ap_check_cmd_context(cmd, GLOBAL_ONLY);
+
+    if (err != NULL) {
+        return err;
+    }
+
+    if (!ap_cstr_casecmp(arg, "OS")) {
+        ap_server_tokens = SrvTk_OS;
+    }
+    else if (!ap_cstr_casecmp(arg, "Min") || !ap_cstr_casecmp(arg, "Minimal")) {
+        ap_server_tokens = SrvTk_MINIMAL;
+    }
+    else if (!ap_cstr_casecmp(arg, "Major")) {
+        ap_server_tokens = SrvTk_MAJOR;
+    }
+    else if (!ap_cstr_casecmp(arg, "Minor") ) {
+        ap_server_tokens = SrvTk_MINOR;
+    }
+    else if (!ap_cstr_casecmp(arg, "Prod") || !ap_cstr_casecmp(arg, "ProductOnly")) {
+        ap_server_tokens = SrvTk_PRODUCT_ONLY;
+    }
+    else if (!ap_cstr_casecmp(arg, "Full")) {
+        ap_server_tokens = SrvTk_FULL;
+    }
+    else {
+        return "ServerTokens takes 1 argument: 'Prod(uctOnly)', 'Major', 'Minor', 'Min(imal)', 'OS', or 'Full'";
+    }
+
+    return NULL;
+}
+
+static const char *set_limit_req_line(cmd_parms *cmd, void *dummy,
+                                      const char *arg)
+{
+    const char *err = ap_check_cmd_context(cmd, NOT_IN_DIR_CONTEXT);
+    int lim;
+
+    if (err != NULL) {
+        return err;
+    }
+
+    lim = atoi(arg);
+    if (lim < 0) {
+        return apr_pstrcat(cmd->temp_pool, "LimitRequestLine \"", arg,
+                           "\" must be a non-negative integer", NULL);
+    }
+
+    cmd->server->limit_req_line = lim;
+    return NULL;
+}
+
+static const char *set_limit_req_fieldsize(cmd_parms *cmd, void *dummy,
+                                           const char *arg)
+{
+    const char *err = ap_check_cmd_context(cmd, NOT_IN_DIR_CONTEXT);
+    int lim;
+
+    if (err != NULL) {
+        return err;
+    }
+
+    lim = atoi(arg);
+    if (lim < 0) {
+        return apr_pstrcat(cmd->temp_pool, "LimitRequestFieldsize \"", arg,
+                          "\" must be a non-negative integer",
+                          NULL);
+    }
+
+    cmd->server->limit_req_fieldsize = lim;
+    return NULL;
+}
+
+static const char *set_limit_req_fields(cmd_parms *cmd, void *dummy,
+                                        const char *arg)
+{
+    const char *err = ap_check_cmd_context(cmd, NOT_IN_DIR_CONTEXT);
+    int lim;
+
+    if (err != NULL) {
+        return err;
+    }
+
+    lim = atoi(arg);
+    if (lim < 0) {
+        return apr_pstrcat(cmd->temp_pool, "LimitRequestFields \"", arg,
+                           "\" must be a non-negative integer (0 = no limit)",
+                           NULL);
+    }
+
+    cmd->server->limit_req_fields = lim;
+    return NULL;
+}
+
+static const char *set_limit_req_body(cmd_parms *cmd, void *conf_,
+                                      const char *arg)
+{
+    core_dir_config *conf = conf_;
+    char *errp;
+
+    if (APR_SUCCESS != apr_strtoff(&conf->limit_req_body, arg, &errp, 10)) {
+        return "LimitRequestBody argument is not parsable.";
+    }
+    if (*errp || conf->limit_req_body < 0) {
+        return "LimitRequestBody requires a non-negative integer.";
+    }
+
+    return NULL;
+}
+
+static const char *set_limit_xml_req_body(cmd_parms *cmd, void *conf_,
+                                          const char *arg)
+{
+    core_dir_config *conf = conf_;
+
+    conf->limit_xml_body = atol(arg);
+    if (conf->limit_xml_body < 0)
+        return "LimitXMLRequestBody requires a non-negative integer.";
+
+    /* zero is AP_MAX_LIMIT_XML_BODY (implicitly) */
+    if ((apr_size_t)conf->limit_xml_body > AP_MAX_LIMIT_XML_BODY)
+        return apr_psprintf(cmd->pool, "LimitXMLRequestBody must not exceed "
+                            "%" APR_SIZE_T_FMT, AP_MAX_LIMIT_XML_BODY);
+
+    return NULL;
+}
+
+static const char *set_max_ranges(cmd_parms *cmd, void *conf_, const char *arg)
+{
+    core_dir_config *conf = conf_;
+    int val = 0;
+
+    if (!ap_cstr_casecmp(arg, "none")) {
+        val = AP_MAXRANGES_NORANGES;
+    }
+    else if (!ap_cstr_casecmp(arg, "default")) {
+        val = AP_MAXRANGES_DEFAULT;
+    }
+    else if (!ap_cstr_casecmp(arg, "unlimited")) {
+        val = AP_MAXRANGES_UNLIMITED;
+    }
+    else {
+        val = atoi(arg);
+        if (val <= 0)
+            return "MaxRanges requires 'none', 'default', 'unlimited' or "
+                   "a positive integer";
+    }
+
+    conf->max_ranges = val;
+
+    return NULL;
+}
+
+static const char *set_max_overlaps(cmd_parms *cmd, void *conf_, const char *arg)
+{
+    core_dir_config *conf = conf_;
+    int val = 0;
+
+    if (!ap_cstr_casecmp(arg, "none")) {
+        val = AP_MAXRANGES_NORANGES;
+    }
+    else if (!ap_cstr_casecmp(arg, "default")) {
+        val = AP_MAXRANGES_DEFAULT;
+    }
+    else if (!ap_cstr_casecmp(arg, "unlimited")) {
+        val = AP_MAXRANGES_UNLIMITED;
+    }
+    else {
+        val = atoi(arg);
+        if (val <= 0)
+            return "MaxRangeOverlaps requires 'none', 'default', 'unlimited' or "
+            "a positive integer";
+    }
+
+    conf->max_overlaps = val;
+
+    return NULL;
+}
+
+static const char *set_max_reversals(cmd_parms *cmd, void *conf_, const char *arg)
+{
+    core_dir_config *conf = conf_;
+    int val = 0;
+
+    if (!ap_cstr_casecmp(arg, "none")) {
+        val = AP_MAXRANGES_NORANGES;
+    }
+    else if (!ap_cstr_casecmp(arg, "default")) {
+        val = AP_MAXRANGES_DEFAULT;
+    }
+    else if (!ap_cstr_casecmp(arg, "unlimited")) {
+        val = AP_MAXRANGES_UNLIMITED;
+    }
+    else {
+        val = atoi(arg);
+        if (val <= 0)
+            return "MaxRangeReversals requires 'none', 'default', 'unlimited' or "
+            "a positive integer";
+    }
+
+    conf->max_reversals = val;
+
+    return NULL;
+}
+
+AP_DECLARE(apr_size_t) ap_get_limit_xml_body(const request_rec *r)
+{
+    core_dir_config *conf;
+
+    conf = ap_get_core_module_config(r->per_dir_config);
+    if (conf->limit_xml_body == AP_LIMIT_UNSET)
+        return AP_DEFAULT_LIMIT_XML_BODY;
+    if (conf->limit_xml_body == 0)
+        return AP_MAX_LIMIT_XML_BODY;
+
+    return (apr_size_t)conf->limit_xml_body;
+}
+
+#if !defined (RLIMIT_CPU) || !(defined (RLIMIT_DATA) || defined (RLIMIT_VMEM) || defined(RLIMIT_AS)) || !defined (RLIMIT_NPROC)
+static const char *no_set_limit(cmd_parms *cmd, void *conf_,
+                                const char *arg, const char *arg2)
+{
+    ap_log_error(APLOG_MARK, APLOG_ERR, 0, cmd->server, APLOGNO(00118)
+                "%s not supported on this platform", cmd->cmd->name);
+
+    return NULL;
+}
+#endif
+
+#ifdef RLIMIT_CPU
+static const char *set_limit_cpu(cmd_parms *cmd, void *conf_,
+                                 const char *arg, const char *arg2)
+{
+    core_dir_config *conf = conf_;
+
+    ap_unixd_set_rlimit(cmd, &conf->limit_cpu, arg, arg2, RLIMIT_CPU);
+    return NULL;
+}
+#endif
+
+#if defined (RLIMIT_DATA) || defined (RLIMIT_VMEM) || defined(RLIMIT_AS)
+static const char *set_limit_mem(cmd_parms *cmd, void *conf_,
+                                 const char *arg, const char * arg2)
+{
+    core_dir_config *conf = conf_;
+
+#if defined(RLIMIT_AS)
+    ap_unixd_set_rlimit(cmd, &conf->limit_mem, arg, arg2 ,RLIMIT_AS);
+#elif defined(RLIMIT_DATA)
+    ap_unixd_set_rlimit(cmd, &conf->limit_mem, arg, arg2, RLIMIT_DATA);
+#elif defined(RLIMIT_VMEM)
+    ap_unixd_set_rlimit(cmd, &conf->limit_mem, arg, arg2, RLIMIT_VMEM);
+#endif
+
+    return NULL;
+}
+#endif
+
+#ifdef RLIMIT_NPROC
+static const char *set_limit_nproc(cmd_parms *cmd, void *conf_,
+                                   const char *arg, const char * arg2)
+{
+    core_dir_config *conf = conf_;
+
+    ap_unixd_set_rlimit(cmd, &conf->limit_nproc, arg, arg2, RLIMIT_NPROC);
+    return NULL;
+}
+#endif
+
+static const char *set_recursion_limit(cmd_parms *cmd, void *dummy,
+                                       const char *arg1, const char *arg2)
+{
+    core_server_config *conf =
+        ap_get_core_module_config(cmd->server->module_config);
+    int limit = atoi(arg1);
+
+    if (limit <= 0) {
+        return "The recursion limit must be greater than zero.";
+    }
+    if (limit < 4) {
+        ap_log_error(APLOG_MARK, APLOG_WARNING, 0, cmd->server, APLOGNO(00119)
+                     "Limiting internal redirects to very low numbers may "
+                     "cause normal requests to fail.");
+    }
+
+    conf->redirect_limit = limit;
+
+    if (arg2) {
+        limit = atoi(arg2);
+
+        if (limit <= 0) {
+            return "The recursion limit must be greater than zero.";
+        }
+        if (limit < 4) {
+            ap_log_error(APLOG_MARK, APLOG_WARNING, 0, cmd->server, APLOGNO(00120)
+                         "Limiting the subrequest depth to a very low level may"
+                         " cause normal requests to fail.");
+        }
+    }
+
+    conf->subreq_limit = limit;
+
+    return NULL;
+}
+
+static void log_backtrace(const request_rec *r)
+{
+    const request_rec *top = r;
+
+    ap_log_rerror(APLOG_MARK, APLOG_DEBUG, 0, r, APLOGNO(00121)
+                  "r->uri = %s", r->uri ? r->uri : "(unexpectedly NULL)");
+
+    while (top && (top->prev || top->main)) {
+        if (top->prev) {
+            top = top->prev;
+            ap_log_rerror(APLOG_MARK, APLOG_DEBUG, 0, r, APLOGNO(00122)
+                          "redirected from r->uri = %s",
+                          top->uri ? top->uri : "(unexpectedly NULL)");
+        }
+
+        if (!top->prev && top->main) {
+            top = top->main;
+            ap_log_rerror(APLOG_MARK, APLOG_DEBUG, 0, r, APLOGNO(00123)
+                          "subrequested from r->uri = %s",
+                          top->uri ? top->uri : "(unexpectedly NULL)");
+        }
+    }
+}
+
+/*
+ * check whether redirect limit is reached
+ */
+AP_DECLARE(int) ap_is_recursion_limit_exceeded(const request_rec *r)
+{
+    core_server_config *conf =
+        ap_get_core_module_config(r->server->module_config);
+    const request_rec *top = r;
+    int redirects = 0, subreqs = 0;
+    int rlimit = conf->redirect_limit
+                 ? conf->redirect_limit
+                 : AP_DEFAULT_MAX_INTERNAL_REDIRECTS;
+    int slimit = conf->subreq_limit
+                 ? conf->subreq_limit
+                 : AP_DEFAULT_MAX_SUBREQ_DEPTH;
+
+
+    while (top->prev || top->main) {
+        if (top->prev) {
+            if (++redirects >= rlimit) {
+                /* uuh, too much. */
+                ap_log_rerror(APLOG_MARK, APLOG_ERR, 0, r, APLOGNO(00124)
+                              "Request exceeded the limit of %d internal "
+                              "redirects due to probable configuration error. "
+                              "Use 'LimitInternalRecursion' to increase the "
+                              "limit if necessary. Use 'LogLevel debug' to get "
+                              "a backtrace.", rlimit);
+
+                /* post backtrace */
+                log_backtrace(r);
+
+                /* return failure */
+                return 1;
+            }
+
+            top = top->prev;
+        }
+
+        if (!top->prev && top->main) {
+            if (++subreqs >= slimit) {
+                /* uuh, too much. */
+                ap_log_rerror(APLOG_MARK, APLOG_ERR, 0, r, APLOGNO(00125)
+                              "Request exceeded the limit of %d subrequest "
+                              "nesting levels due to probable configuration "
+                              "error. Use 'LimitInternalRecursion' to increase "
+                              "the limit if necessary. Use 'LogLevel debug' to "
+                              "get a backtrace.", slimit);
+
+                /* post backtrace */
+                log_backtrace(r);
+
+                /* return failure */
+                return 1;
+            }
+
+            top = top->main;
+        }
+    }
+
+    /* recursion state: ok */
+    return 0;
+}
+
+static const char *set_trace_enable(cmd_parms *cmd, void *dummy,
+                                    const char *arg1)
+{
+    core_server_config *conf =
+        ap_get_core_module_config(cmd->server->module_config);
+
+    if (ap_cstr_casecmp(arg1, "on") == 0) {
+        conf->trace_enable = AP_TRACE_ENABLE;
+    }
+    else if (ap_cstr_casecmp(arg1, "off") == 0) {
+        conf->trace_enable = AP_TRACE_DISABLE;
+    }
+    else if (ap_cstr_casecmp(arg1, "extended") == 0) {
+        conf->trace_enable = AP_TRACE_EXTENDED;
+    }
+    else {
+        return "TraceEnable must be one of 'on', 'off', or 'extended'";
+    }
+
+    return NULL;
+}
+
+static const char *set_protocols(cmd_parms *cmd, void *dummy,
+                                 const char *arg)
+{
+    core_server_config *conf =
+    ap_get_core_module_config(cmd->server->module_config);
+    const char **np;
+    const char *err = ap_check_cmd_context(cmd, NOT_IN_DIR_CONTEXT);
+
+    if (err) {
+        return err;
+    }
+    
+    np = (const char **)apr_array_push(conf->protocols);
+    *np = arg;
+
+    return NULL;
+}
+
+static const char *set_protocols_honor_order(cmd_parms *cmd, void *dummy,
+                                             const char *arg)
+{
+    core_server_config *conf =
+    ap_get_core_module_config(cmd->server->module_config);
+    const char *err = ap_check_cmd_context(cmd, NOT_IN_DIR_CONTEXT);
+    
+    if (err) {
+        return err;
+    }
+    
+    if (ap_cstr_casecmp(arg, "on") == 0) {
+        conf->protocols_honor_order = 1;
+    }
+    else if (ap_cstr_casecmp(arg, "off") == 0) {
+        conf->protocols_honor_order = 0;
+    }
+    else {
+        return "ProtocolsHonorOrder must be 'on' or 'off'";
+    }
+    
+    return NULL;
+}
+
+static const char *set_http_protocol_options(cmd_parms *cmd, void *dummy,
+                                             const char *arg)
+{
+    core_server_config *conf =
+        ap_get_core_module_config(cmd->server->module_config);
+
+    if (strcasecmp(arg, "allow0.9") == 0)
+        conf->http09_enable |= AP_HTTP09_ENABLE;
+    else if (strcasecmp(arg, "require1.0") == 0)
+        conf->http09_enable |= AP_HTTP09_DISABLE;
+    else if (strcasecmp(arg, "strict") == 0)
+        conf->http_conformance |= AP_HTTP_CONFORMANCE_STRICT;
+    else if (strcasecmp(arg, "unsafe") == 0)
+        conf->http_conformance |= AP_HTTP_CONFORMANCE_UNSAFE;
+    else if (strcasecmp(arg, "registeredmethods") == 0)
+        conf->http_methods |= AP_HTTP_METHODS_REGISTERED;
+    else if (strcasecmp(arg, "lenientmethods") == 0)
+        conf->http_methods |= AP_HTTP_METHODS_LENIENT;
+    else
+        return "HttpProtocolOptions accepts "
+               "'Unsafe' or 'Strict' (default), "
+               "'RegisteredMethods' or 'LenientMethods' (default), and "
+               "'Require1.0' or 'Allow0.9' (default)";
+
+    if ((conf->http09_enable & AP_HTTP09_ENABLE)
+            && (conf->http09_enable & AP_HTTP09_DISABLE))
+        return "HttpProtocolOptions 'Allow0.9' and 'Require1.0'"
+               " are mutually exclusive";
+
+    if ((conf->http_conformance & AP_HTTP_CONFORMANCE_STRICT)
+            && (conf->http_conformance & AP_HTTP_CONFORMANCE_UNSAFE))
+        return "HttpProtocolOptions 'Strict' and 'Unsafe'"
+               " are mutually exclusive";
+
+    if ((conf->http_methods & AP_HTTP_METHODS_REGISTERED)
+            && (conf->http_methods & AP_HTTP_METHODS_LENIENT))
+        return "HttpProtocolOptions 'RegisteredMethods' and 'LenientMethods'"
+               " are mutually exclusive";
+
+    return NULL;
+}
+
+static const char *set_http_method(cmd_parms *cmd, void *conf, const char *arg)
+{
+    const char *err = ap_check_cmd_context(cmd, GLOBAL_ONLY);
+    if (err != NULL)
+        return err;
+    ap_method_register(cmd->pool, arg);
+    return NULL;
+}
+
+static apr_hash_t *errorlog_hash;
+
+static int log_constant_item(const ap_errorlog_info *info, const char *arg,
+                             char *buf, int buflen)
+{
+    char *end = apr_cpystrn(buf, arg, buflen);
+    return end - buf;
+}
+
+static char *parse_errorlog_misc_string(apr_pool_t *p,
+                                        ap_errorlog_format_item *it,
+                                        const char **sa)
+{
+    const char *s;
+    char scratch[MAX_STRING_LEN];
+    char *d = scratch;
+    /*
+     * non-leading white space terminates this string to allow the next field
+     * separator to be inserted
+     */
+    int at_start = 1;
+
+    it->func = log_constant_item;
+    s = *sa;
+
+    while (*s && *s != '%' && (*s != ' ' || at_start) && d < scratch + MAX_STRING_LEN) {
+        if (*s != '\\') {
+            if (*s != ' ') {
+                at_start = 0;
+            }
+            *d++ = *s++;
+        }
+        else {
+            s++;
+            switch (*s) {
+            case 'r':
+                *d++ = '\r';
+                s++;
+                break;
+            case 'n':
+                *d++ = '\n';
+                s++;
+                break;
+            case 't':
+                *d++ = '\t';
+                s++;
+                break;
+            case '\0':
+                /* handle end of string */
+                *d++ = '\\';
+                break;
+            default:
+                /* copy next char verbatim */
+                *d++ = *s++;
+                break;
+            }
+        }
+    }
+    *d = '\0';
+    it->arg = apr_pstrdup(p, scratch);
+
+    *sa = s;
+    return NULL;
+}
+
+static char *parse_errorlog_item(apr_pool_t *p, ap_errorlog_format_item *it,
+                                 const char **sa)
+{
+    const char *s = *sa;
+    ap_errorlog_handler *handler;
+    int i;
+
+    if (*s != '%') {
+        if (*s == ' ') {
+            it->flags |= AP_ERRORLOG_FLAG_FIELD_SEP;
+        }
+        return parse_errorlog_misc_string(p, it, sa);
+    }
+
+    ++s;
+
+    if (*s == ' ') {
+        /* percent-space (% ) is a field separator */
+        it->flags |= AP_ERRORLOG_FLAG_FIELD_SEP;
+        *sa = ++s;
+        /* recurse */
+        return parse_errorlog_item(p, it, sa);
+    }
+    else if (*s == '%') {
+        it->arg = "%";
+        it->func = log_constant_item;
+        *sa = ++s;
+        return NULL;
+    }
+
+    while (*s) {
+        switch (*s) {
+        case '{':
+            ++s;
+            it->arg = ap_getword(p, &s, '}');
+            break;
+        case '+':
+            ++s;
+            it->flags |= AP_ERRORLOG_FLAG_REQUIRED;
+            break;
+        case '-':
+            ++s;
+            it->flags |= AP_ERRORLOG_FLAG_NULL_AS_HYPHEN;
+            break;
+        case '0':
+        case '1':
+        case '2':
+        case '3':
+        case '4':
+        case '5':
+        case '6':
+        case '7':
+        case '8':
+        case '9':
+            i = *s - '0';
+            while (apr_isdigit(*++s))
+                i = i * 10 + (*s) - '0';
+            it->min_loglevel = i;
+            break;
+        case 'M':
+            it->func = NULL;
+            it->flags |= AP_ERRORLOG_FLAG_MESSAGE;
+            *sa = ++s;
+            return NULL;
+        default:
+            handler = (ap_errorlog_handler *)apr_hash_get(errorlog_hash, s, 1);
+            if (!handler) {
+                char dummy[2];
+
+                dummy[0] = *s;
+                dummy[1] = '\0';
+                return apr_pstrcat(p, "Unrecognized error log format directive %",
+                               dummy, NULL);
+            }
+            it->func = handler->func;
+            *sa = ++s;
+            return NULL;
+        }
+    }
+
+    return "Ran off end of error log format parsing args to some directive";
+}
+
+static apr_array_header_t *parse_errorlog_string(apr_pool_t *p,
+                                                 const char *s,
+                                                 const char **err,
+                                                 int is_main_fmt)
+{
+    apr_array_header_t *a = apr_array_make(p, 30,
+                                           sizeof(ap_errorlog_format_item));
+    char *res;
+    int seen_msg_fmt = 0;
+
+    while (s && *s) {
+        ap_errorlog_format_item *item =
+            (ap_errorlog_format_item *)apr_array_push(a);
+        memset(item, 0, sizeof(*item));
+        res = parse_errorlog_item(p, item, &s);
+        if (res) {
+            *err = res;
+            return NULL;
+        }
+        if (item->flags & AP_ERRORLOG_FLAG_MESSAGE) {
+            if (!is_main_fmt) {
+                *err = "%M cannot be used in once-per-request or "
+                       "once-per-connection formats";
+                return NULL;
+            }
+            seen_msg_fmt = 1;
+        }
+        if (is_main_fmt && item->flags & AP_ERRORLOG_FLAG_REQUIRED) {
+            *err = "The '+' flag cannot be used in the main error log format";
+            return NULL;
+        }
+        if (!is_main_fmt && item->min_loglevel) {
+            *err = "The loglevel cannot be used as a condition in "
+                   "once-per-request or once-per-connection formats";
+            return NULL;
+        }
+        if (item->min_loglevel > APLOG_TRACE8) {
+            *err = "The specified loglevel modifier is out of range";
+            return NULL;
+        }
+    }
+
+    if (is_main_fmt && !seen_msg_fmt) {
+        *err = "main ErrorLogFormat must contain message format string '%M'";
+        return NULL;
+    }
+
+    return a;
+}
+
+static const char *set_errorlog_format(cmd_parms *cmd, void *dummy,
+                                       const char *arg1, const char *arg2)
+{
+    const char *err_string = NULL;
+    core_server_config *conf =
+        ap_get_core_module_config(cmd->server->module_config);
+
+    if (!arg2) {
+        conf->error_log_format = parse_errorlog_string(cmd->pool, arg1,
+                                                       &err_string, 1);
+    }
+    else if (!ap_cstr_casecmp(arg1, "connection")) {
+        if (!conf->error_log_conn) {
+            conf->error_log_conn = apr_array_make(cmd->pool, 5,
+                                                  sizeof(apr_array_header_t *));
+        }
+
+        if (*arg2) {
+            apr_array_header_t **e;
+            e = (apr_array_header_t **) apr_array_push(conf->error_log_conn);
+            *e = parse_errorlog_string(cmd->pool, arg2, &err_string, 0);
+        }
+    }
+    else if (!ap_cstr_casecmp(arg1, "request")) {
+        if (!conf->error_log_req) {
+            conf->error_log_req = apr_array_make(cmd->pool, 5,
+                                                 sizeof(apr_array_header_t *));
+        }
+
+        if (*arg2) {
+            apr_array_header_t **e;
+            e = (apr_array_header_t **) apr_array_push(conf->error_log_req);
+            *e = parse_errorlog_string(cmd->pool, arg2, &err_string, 0);
+        }
+    }
+    else {
+        err_string = "ErrorLogFormat type must be one of request, connection";
+    }
+
+    return err_string;
+}
+
+AP_DECLARE(void) ap_register_errorlog_handler(apr_pool_t *p, char *tag,
+                                              ap_errorlog_handler_fn_t *handler,
+                                              int flags)
+{
+    ap_errorlog_handler *log_struct = apr_palloc(p, sizeof(*log_struct));
+    log_struct->func = handler;
+    log_struct->flags = flags;
+
+    apr_hash_set(errorlog_hash, tag, 1, (const void *)log_struct);
+}
+
+
+static const char *set_merge_trailers(cmd_parms *cmd, void *dummy, int arg)
+{
+    core_server_config *conf = ap_get_module_config(cmd->server->module_config,
+                                                    &core_module);
+    conf->merge_trailers = (arg ? AP_MERGE_TRAILERS_ENABLE :
+            AP_MERGE_TRAILERS_DISABLE);
+
+    return NULL;
+}
+
+/* Note --- ErrorDocument will now work from .htaccess files.
+ * The AllowOverride of Fileinfo allows webmasters to turn it off
+ */
+
+static const command_rec core_cmds[] = {
+
+/* Old access config file commands */
+
+AP_INIT_RAW_ARGS("<Directory", dirsection, NULL, RSRC_CONF,
+  "Container for directives affecting resources located in the specified "
+  "directories"),
+AP_INIT_RAW_ARGS("<Location", urlsection, NULL, RSRC_CONF,
+  "Container for directives affecting resources accessed through the "
+  "specified URL paths"),
+AP_INIT_RAW_ARGS("<VirtualHost", virtualhost_section, NULL, RSRC_CONF,
+  "Container to map directives to a particular virtual host, takes one or "
+  "more host addresses"),
+AP_INIT_RAW_ARGS("<Files", filesection, NULL, OR_ALL,
+  "Container for directives affecting files matching specified patterns"),
+AP_INIT_RAW_ARGS("<Limit", ap_limit_section, NULL, OR_LIMIT | OR_AUTHCFG,
+  "Container for authentication directives when accessed using specified HTTP "
+  "methods"),
+AP_INIT_RAW_ARGS("<LimitExcept", ap_limit_section, (void*)1,
+                 OR_LIMIT | OR_AUTHCFG,
+  "Container for authentication directives to be applied when any HTTP "
+  "method other than those specified is used to access the resource"),
+AP_INIT_RAW_ARGS("<IfModule", start_cond_section, (void *)test_ifmod_section,
+              EXEC_ON_READ | OR_ALL,
+  "Container for directives based on existence of specified modules"),
+AP_INIT_RAW_ARGS("<IfDefine", start_cond_section, (void *)test_ifdefine_section,
+              EXEC_ON_READ | OR_ALL,
+  "Container for directives based on existence of command line defines"),
+AP_INIT_RAW_ARGS("<IfFile", start_cond_section, (void *)test_iffile_section,
+              EXEC_ON_READ | OR_ALL,
+  "Container for directives based on existence of files on disk"),
+AP_INIT_RAW_ARGS("<IfDirective", start_cond_section, (void *)test_ifdirective_section,
+              EXEC_ON_READ | OR_ALL,
+  "Container for directives based on existence of named directive"),
+AP_INIT_RAW_ARGS("<IfSection", start_cond_section, (void *)test_ifsection_section,
+              EXEC_ON_READ | OR_ALL,
+  "Container for directives based on existence of named section"),
+AP_INIT_RAW_ARGS("<DirectoryMatch", dirsection, (void*)1, RSRC_CONF,
+  "Container for directives affecting resources located in the "
+  "specified directories"),
+AP_INIT_RAW_ARGS("<LocationMatch", urlsection, (void*)1, RSRC_CONF,
+  "Container for directives affecting resources accessed through the "
+  "specified URL paths"),
+AP_INIT_RAW_ARGS("<FilesMatch", filesection, (void*)1, OR_ALL,
+  "Container for directives affecting files matching specified patterns"),
+#ifdef GPROF
+AP_INIT_TAKE1("GprofDir", set_gprof_dir, NULL, RSRC_CONF,
+  "Directory to plop gmon.out files"),
+#endif
+AP_INIT_TAKE1("AddDefaultCharset", set_add_default_charset, NULL, OR_FILEINFO,
+  "The name of the default charset to add to any Content-Type without one or 'Off' to disable"),
+AP_INIT_TAKE1("AcceptPathInfo", set_accept_path_info, NULL, OR_FILEINFO,
+  "Set to on or off for PATH_INFO to be accepted by handlers, or default for the per-handler preference"),
+AP_INIT_TAKE12("Define", set_define, NULL, EXEC_ON_READ|ACCESS_CONF|RSRC_CONF,
+              "Define a variable, optionally to a value.  Same as passing -D to the command line."),
+AP_INIT_TAKE1("UnDefine", unset_define, NULL, EXEC_ON_READ|ACCESS_CONF|RSRC_CONF,
+              "Undefine the existence of a variable. Undo a Define."),
+AP_INIT_RAW_ARGS("Error", generate_error, NULL, OR_ALL,
+                 "Generate error message from within configuration"),
+AP_INIT_RAW_ARGS("<If", ifsection, COND_IF, OR_ALL,
+  "Container for directives to be conditionally applied"),
+AP_INIT_RAW_ARGS("<ElseIf", ifsection, COND_ELSEIF, OR_ALL,
+  "Container for directives to be conditionally applied"),
+AP_INIT_RAW_ARGS("<Else", ifsection, COND_ELSE, OR_ALL,
+  "Container for directives to be conditionally applied"),
+
+/* Old resource config file commands */
+
+AP_INIT_RAW_ARGS("AccessFileName", set_access_name, NULL, RSRC_CONF,
+  "Name(s) of per-directory config files (default: .htaccess)"),
+AP_INIT_TAKE1("DocumentRoot", set_document_root, NULL, RSRC_CONF,
+  "Root directory of the document tree"),
+AP_INIT_TAKE2("ErrorDocument", set_error_document, NULL, OR_FILEINFO,
+  "Change responses for HTTP errors"),
+AP_INIT_RAW_ARGS("AllowOverride", set_override, NULL, ACCESS_CONF,
+  "Controls what groups of directives can be configured by per-directory "
+  "config files"),
+AP_INIT_TAKE_ARGV("AllowOverrideList", set_override_list, NULL, ACCESS_CONF,
+  "Controls what individual directives can be configured by per-directory "
+  "config files"),
+AP_INIT_RAW_ARGS("Options", set_options, NULL, OR_OPTIONS,
+  "Set a number of attributes for a given directory"),
+AP_INIT_TAKE1("DefaultType", set_default_type, NULL, OR_FILEINFO,
+  "the default media type for otherwise untyped files (DEPRECATED)"),
+AP_INIT_RAW_ARGS("FileETag", set_etag_bits, NULL, OR_FILEINFO,
+  "Specify components used to construct a file's ETag"),
+AP_INIT_TAKE1("EnableMMAP", set_enable_mmap, NULL, OR_FILEINFO,
+  "Controls whether memory-mapping may be used to read files"),
+AP_INIT_TAKE1("EnableSendfile", set_enable_sendfile, NULL, OR_FILEINFO,
+  "Controls whether sendfile may be used to transmit files"),
+AP_INIT_TAKE1("ReadBufferSize", set_read_buf_size, NULL, ACCESS_CONF|RSRC_CONF,
+  "Size (in bytes) of the memory buffers used to read data"),
+AP_INIT_TAKE1("FlushMaxThreshold", set_flush_max_threshold, NULL, RSRC_CONF,
+  "Maximum threshold above which pending data are flushed to the network"),
+AP_INIT_TAKE1("FlushMaxPipelined", set_flush_max_pipelined, NULL, RSRC_CONF,
+  "Maximum number of pipelined responses (pending) above which they are "
+  "flushed to the network"),
+
+/* Old server config file commands */
+
+AP_INIT_TAKE1("Protocol", set_protocol, NULL, RSRC_CONF,
+  "Set the Protocol for httpd to use."),
+AP_INIT_TAKE2("AcceptFilter", set_accf_map, NULL, RSRC_CONF,
+  "Set the Accept Filter to use for a protocol"),
+AP_INIT_TAKE1("Port", ap_set_deprecated, NULL, RSRC_CONF,
+  "Port was replaced with Listen in Apache 2.0"),
+AP_INIT_TAKE1("HostnameLookups", set_hostname_lookups, NULL,
+  ACCESS_CONF|RSRC_CONF,
+  "\"on\" to enable, \"off\" to disable reverse DNS lookups, or \"double\" to "
+  "enable double-reverse DNS lookups"),
+AP_INIT_TAKE1("ServerAdmin", set_server_string_slot,
+  (void *)APR_OFFSETOF(server_rec, server_admin), RSRC_CONF,
+  "The email address of the server administrator"),
+AP_INIT_TAKE1("ServerName", server_hostname_port, NULL, RSRC_CONF,
+  "The hostname and port of the server"),
+AP_INIT_TAKE1("ServerSignature", set_signature_flag, NULL, OR_ALL,
+  "En-/disable server signature (on|off|email)"),
+AP_INIT_TAKE1("ServerRoot", set_server_root, NULL, RSRC_CONF | EXEC_ON_READ,
+  "Common directory of server-related files (logs, confs, etc.)"),
+AP_INIT_TAKE1("DefaultRuntimeDir", set_runtime_dir, NULL, RSRC_CONF | EXEC_ON_READ,
+  "Common directory for run-time files (shared memory, locks, etc.)"),
+AP_INIT_TAKE1("ErrorLog", set_server_string_slot,
+  (void *)APR_OFFSETOF(server_rec, error_fname), RSRC_CONF,
+  "The filename of the error log"),
+AP_INIT_TAKE12("ErrorLogFormat", set_errorlog_format, NULL, RSRC_CONF,
+  "Format string for the ErrorLog"),
+AP_INIT_RAW_ARGS("ServerAlias", set_server_alias, NULL, RSRC_CONF,
+  "A name or names alternately used to access the server"),
+AP_INIT_TAKE1("ServerPath", set_serverpath, NULL, RSRC_CONF,
+  "The pathname the server can be reached at"),
+AP_INIT_TAKE1("Timeout", set_timeout, NULL, RSRC_CONF,
+  "Timeout duration (sec)"),
+AP_INIT_FLAG("ContentDigest", set_content_md5, NULL, OR_OPTIONS,
+  "whether or not to send a Content-MD5 header with each request"),
+AP_INIT_TAKE1("UseCanonicalName", set_use_canonical_name, NULL,
+  RSRC_CONF|ACCESS_CONF,
+  "How to work out the ServerName : Port when constructing URLs"),
+AP_INIT_TAKE1("UseCanonicalPhysicalPort", set_use_canonical_phys_port, NULL,
+  RSRC_CONF|ACCESS_CONF,
+  "Whether to use the physical Port when constructing URLs"),
+/* TODO: RlimitFoo should all be part of mod_cgi, not in the core */
+/* TODO: ListenBacklog in MPM */
+AP_INIT_TAKE1("Include", include_config, NULL,
+  (RSRC_CONF | ACCESS_CONF | EXEC_ON_READ),
+  "Name(s) of the config file(s) to be included; fails if the wildcard does "
+  "not match at least one file"),
+AP_INIT_TAKE1("IncludeOptional", include_config, (void*)1,
+  (RSRC_CONF | ACCESS_CONF | EXEC_ON_READ),
+  "Name or pattern of the config file(s) to be included; ignored if the file "
+  "does not exist or the pattern does not match any files"),
+AP_INIT_ITERATE("LogLevel", set_loglevel, NULL, RSRC_CONF|ACCESS_CONF,
+  "Level of verbosity in error logging"),
+AP_INIT_TAKE1("NameVirtualHost", ap_set_name_virtual_host, NULL, RSRC_CONF,
+  "A numeric IP address:port, or the name of a host"),
+AP_INIT_TAKE1("ServerTokens", set_serv_tokens, NULL, RSRC_CONF,
+  "Determine tokens displayed in the Server: header - Min(imal), "
+  "Major, Minor, Prod(uctOnly), OS, or Full"),
+AP_INIT_TAKE1("LimitRequestLine", set_limit_req_line, NULL, RSRC_CONF,
+  "Limit on maximum size of an HTTP request line"),
+AP_INIT_TAKE1("LimitRequestFieldsize", set_limit_req_fieldsize, NULL,
+  RSRC_CONF,
+  "Limit on maximum size of an HTTP request header field"),
+AP_INIT_TAKE1("LimitRequestFields", set_limit_req_fields, NULL, RSRC_CONF,
+  "Limit (0 = unlimited) on max number of header fields in a request message"),
+AP_INIT_TAKE1("LimitRequestBody", set_limit_req_body,
+  (void*)APR_OFFSETOF(core_dir_config, limit_req_body), OR_ALL,
+  "Limit (in bytes) on maximum size of request message body"),
+AP_INIT_TAKE1("LimitXMLRequestBody", set_limit_xml_req_body, NULL, OR_ALL,
+              "Limit (in bytes) on maximum size of an XML-based request "
+              "body"),
+AP_INIT_RAW_ARGS("Mutex", ap_set_mutex, NULL, RSRC_CONF,
+                 "mutex (or \"default\") and mechanism"),
+
+AP_INIT_TAKE1("MaxRanges", set_max_ranges, NULL, RSRC_CONF|ACCESS_CONF,
+              "Maximum number of Ranges in a request before returning the entire "
+              "resource, or 0 for unlimited"),
+AP_INIT_TAKE1("MaxRangeOverlaps", set_max_overlaps, NULL, RSRC_CONF|ACCESS_CONF,
+              "Maximum number of overlaps in Ranges in a request before returning the entire "
+              "resource, or 0 for unlimited"),
+AP_INIT_TAKE1("MaxRangeReversals", set_max_reversals, NULL, RSRC_CONF|ACCESS_CONF,
+              "Maximum number of reversals in Ranges in a request before returning the entire "
+              "resource, or 0 for unlimited"),
+/* System Resource Controls */
+#ifdef RLIMIT_CPU
+AP_INIT_TAKE12("RLimitCPU", set_limit_cpu,
+  (void*)APR_OFFSETOF(core_dir_config, limit_cpu),
+  OR_ALL, "Soft/hard limits for max CPU usage in seconds"),
+#else
+AP_INIT_TAKE12("RLimitCPU", no_set_limit, NULL,
+  OR_ALL, "Soft/hard limits for max CPU usage in seconds"),
+#endif
+#if defined (RLIMIT_DATA) || defined (RLIMIT_VMEM) || defined (RLIMIT_AS)
+AP_INIT_TAKE12("RLimitMEM", set_limit_mem,
+  (void*)APR_OFFSETOF(core_dir_config, limit_mem),
+  OR_ALL, "Soft/hard limits for max memory usage per process"),
+#else
+AP_INIT_TAKE12("RLimitMEM", no_set_limit, NULL,
+  OR_ALL, "Soft/hard limits for max memory usage per process"),
+#endif
+#ifdef RLIMIT_NPROC
+AP_INIT_TAKE12("RLimitNPROC", set_limit_nproc,
+  (void*)APR_OFFSETOF(core_dir_config, limit_nproc),
+  OR_ALL, "soft/hard limits for max number of processes per uid"),
+#else
+AP_INIT_TAKE12("RLimitNPROC", no_set_limit, NULL,
+   OR_ALL, "soft/hard limits for max number of processes per uid"),
+#endif
+
+AP_INIT_RAW_ARGS("RegexDefaultOptions", set_regex_default_options, NULL, RSRC_CONF,
+                 "default options for regexes (prefixed by '+' to add, '-' to del)"),
+
+/* internal recursion stopper */
+AP_INIT_TAKE12("LimitInternalRecursion", set_recursion_limit, NULL, RSRC_CONF,
+              "maximum recursion depth of internal redirects and subrequests"),
+
+AP_INIT_FLAG("CGIPassAuth", set_cgi_pass_auth, NULL, OR_AUTHCFG,
+             "Controls whether HTTP authorization headers, normally hidden, will "
+             "be passed to scripts"),
+AP_INIT_TAKE2("CGIVar", set_cgi_var, NULL, OR_FILEINFO,
+              "Controls how some CGI variables are set"),
+AP_INIT_FLAG("QualifyRedirectURL", set_qualify_redirect_url, NULL, OR_FILEINFO,
+             "Controls whether the REDIRECT_URL environment variable is fully "
+             "qualified"),
+AP_INIT_FLAG("StrictHostCheck", set_core_server_flag, 
+             (void *)APR_OFFSETOF(core_server_config, strict_host_check),  
+             RSRC_CONF,
+             "Controls whether a hostname match is required"),
+AP_INIT_TAKE1("ForceType", ap_set_string_slot_lower,
+       (void *)APR_OFFSETOF(core_dir_config, mime_type), OR_FILEINFO,
+     "a mime type that overrides other configured type"),
+AP_INIT_TAKE1("SetHandler", set_sethandler, NULL, OR_FILEINFO,
+   "a handler name that overrides any other configured handler"),
+AP_INIT_TAKE1("SetOutputFilter", ap_set_string_slot,
+       (void *)APR_OFFSETOF(core_dir_config, output_filters), OR_FILEINFO,
+   "filter (or ; delimited list of filters) to be run on the request content"),
+AP_INIT_TAKE1("SetInputFilter", ap_set_string_slot,
+       (void *)APR_OFFSETOF(core_dir_config, input_filters), OR_FILEINFO,
+   "filter (or ; delimited list of filters) to be run on the request body"),
+AP_INIT_TAKE1("AllowEncodedSlashes", set_allow2f, NULL, RSRC_CONF,
+             "Allow URLs containing '/' encoded as '%2F'"),
+
+/* scoreboard.c directives */
+AP_INIT_TAKE1("ScoreBoardFile", ap_set_scoreboard, NULL, RSRC_CONF,
+              "A file for Apache to maintain runtime process management information"),
+AP_INIT_FLAG("ExtendedStatus", ap_set_extended_status, NULL, RSRC_CONF,
+             "\"On\" to track extended status information, \"Off\" to disable"),
+AP_INIT_FLAG("SeeRequestTail", ap_set_reqtail, NULL, RSRC_CONF,
+             "For extended status, \"On\" to see the last 63 chars of "
+             "the request line, \"Off\" (default) to see the first 63"),
+
+/*
+ * These are default configuration directives that mpms can/should
+ * pay attention to.
+ * XXX These are not for all platforms, and even some Unix MPMs might not want
+ * some directives.
+ */
+AP_INIT_TAKE1("PidFile",  ap_mpm_set_pidfile, NULL, RSRC_CONF,
+              "A file for logging the server process ID"),
+AP_INIT_TAKE1("MaxRequestsPerChild", ap_mpm_set_max_requests, NULL, RSRC_CONF,
+              "Maximum number of connections a particular child serves before "
+              "dying. (DEPRECATED, use MaxConnectionsPerChild)"),
+AP_INIT_TAKE1("MaxConnectionsPerChild", ap_mpm_set_max_requests, NULL, RSRC_CONF,
+              "Maximum number of connections a particular child serves before dying."),
+AP_INIT_TAKE1("CoreDumpDirectory", ap_mpm_set_coredumpdir, NULL, RSRC_CONF,
+              "The location of the directory Apache changes to before dumping core"),
+AP_INIT_TAKE1("MaxMemFree", ap_mpm_set_max_mem_free, NULL, RSRC_CONF,
+              "Maximum number of 1k blocks a particular child's allocator may hold."),
+AP_INIT_TAKE1("ThreadStackSize", ap_mpm_set_thread_stacksize, NULL, RSRC_CONF,
+              "Size in bytes of stack used by threads handling client connections"),
+#if AP_ENABLE_EXCEPTION_HOOK
+AP_INIT_TAKE1("EnableExceptionHook", ap_mpm_set_exception_hook, NULL, RSRC_CONF,
+              "Controls whether exception hook may be called after a crash"),
+#endif
+AP_INIT_TAKE1("TraceEnable", set_trace_enable, NULL, RSRC_CONF,
+              "'on' (default), 'off' or 'extended' to trace request body content"),
+AP_INIT_FLAG("MergeTrailers", set_merge_trailers, NULL, RSRC_CONF,
+              "merge request trailers into request headers or not"),
+AP_INIT_ITERATE("Protocols", set_protocols, NULL, RSRC_CONF,
+                "Controls which protocols are allowed"),
+AP_INIT_TAKE1("ProtocolsHonorOrder", set_protocols_honor_order, NULL, RSRC_CONF,
+              "'off' (default) or 'on' to respect given order of protocols, "
+              "by default the client specified order determines selection"),
+AP_INIT_ITERATE("HttpProtocolOptions", set_http_protocol_options, NULL, RSRC_CONF,
+                "'Allow0.9' or 'Require1.0' (default); "
+                "'RegisteredMethods' or 'LenientMethods' (default); "
+                "'Unsafe' or 'Strict' (default). Sets HTTP acceptance rules"),
+AP_INIT_ITERATE("RegisterHttpMethod", set_http_method, NULL, RSRC_CONF,
+                "Registers non-standard HTTP methods"),
+AP_INIT_FLAG("MergeSlashes", set_core_server_flag, 
+             (void *)APR_OFFSETOF(core_server_config, merge_slashes),  
+             RSRC_CONF,
+             "Controls whether consecutive slashes in the URI path are merged"),
+{ NULL }
+};
+
+/*****************************************************************
+ *
+ * Core handlers for various phases of server operation...
+ */
+
+AP_DECLARE_NONSTD(int) ap_core_translate(request_rec *r)
+{
+    apr_status_t rv;
+    char *path;
+
+    /* XXX this seems too specific, this should probably become
+     * some general-case test
+     */
+    if (r->proxyreq) {
+        return HTTP_FORBIDDEN;
+    }
+    if (!r->uri || ((r->uri[0] != '/') && strcmp(r->uri, "*"))) {
+        ap_log_rerror(APLOG_MARK, APLOG_ERR, 0, r, APLOGNO(00126)
+                     "Invalid URI in request '%s' '%s'", r->uri, r->the_request);
+        return HTTP_BAD_REQUEST;
+    }
+
+    if (r->server->path
+        && !strncmp(r->uri, r->server->path, r->server->pathlen)
+        && (r->server->path[r->server->pathlen - 1] == '/'
+            || r->uri[r->server->pathlen] == '/'
+            || r->uri[r->server->pathlen] == '\0'))
+    {
+        path = r->uri + r->server->pathlen;
+    }
+    else {
+        path = r->uri;
+    }
+    /*
+     * Make sure that we do not mess up the translation by adding two
+     * /'s in a row.  This happens under windows when the document
+     * root ends with a /
+     */
+    /* skip all leading /'s (e.g. http://localhost///foo)
+     * so we are looking at only the relative path.
+     */
+    while (*path == '/') {
+        ++path;
+    }
+    if ((rv = apr_filepath_merge(&r->filename, ap_document_root(r), path,
+                                 APR_FILEPATH_TRUENAME
+                               | APR_FILEPATH_SECUREROOT, r->pool))
+                != APR_SUCCESS) {
+        ap_log_rerror(APLOG_MARK, APLOG_ERR, rv, r, APLOGNO(00127)
+                     "Cannot map %s to file", r->the_request);
+        return HTTP_FORBIDDEN;
+    }
+    r->canonical_filename = r->filename;
+
+    return OK;
+}
+
+/*****************************************************************
+ *
+ * Test the filesystem name through directory_walk and file_walk
+ */
+static int core_map_to_storage(request_rec *r)
+{
+    int access_status;
+
+    if ((access_status = ap_directory_walk(r))) {
+        return access_status;
+    }
+
+    if ((access_status = ap_file_walk(r))) {
+        return access_status;
+    }
+
+    return OK;
+}
+
+
+static int do_nothing(request_rec *r) { return OK; }
+
+static int core_override_type(request_rec *r)
+{
+    core_dir_config *conf =
+        (core_dir_config *)ap_get_core_module_config(r->per_dir_config);
+
+    /* Check for overrides with ForceType / SetHandler
+     */
+    if (conf->mime_type && strcmp(conf->mime_type, "none"))
+        ap_set_content_type(r, (char*) conf->mime_type);
+
+    if (conf->expr_handler) { 
+        const char *err;
+        const char *val;
+        val = ap_expr_str_exec(r, conf->expr_handler, &err);
+        if (err) {
+            ap_log_rerror(APLOG_MARK, APLOG_ERR, 0, r, APLOGNO(03154)
+                          "Can't evaluate handler expression: %s", err);
+            return HTTP_INTERNAL_SERVER_ERROR;
+        }
+
+        if (val != ap_strstr_c(val, "proxy:unix")) { 
+            /* Retained for compatibility --  but not for UDS */
+            char *tmp = apr_pstrdup(r->pool, val);
+            ap_str_tolower(tmp);
+            val = tmp;
+        }
+
+        if (strcmp(val, "none")) { 
+            r->handler = val;
+        }
+    }
+    else if (conf->handler && strcmp(conf->handler, "none")) { 
+        r->handler = conf->handler;
+    }
+
+    /* Deal with the poor soul who is trying to force path_info to be
+     * accepted within the core_handler, where they will let the subreq
+     * address its contents.  This is toggled by the user in the very
+     * beginning of the fixup phase (here!), so modules should override the user's
+     * discretion in their own module fixup phase.  It is tristate, if
+     * the user doesn't specify, the result is AP_REQ_DEFAULT_PATH_INFO.
+     * (which the module may interpret to its own customary behavior.)
+     * It won't be touched if the value is no longer AP_ACCEPT_PATHINFO_UNSET,
+     * so any module changing the value prior to the fixup phase
+     * OVERRIDES the user's choice.
+     */
+    if ((r->used_path_info == AP_REQ_DEFAULT_PATH_INFO)
+        && (conf->accept_path_info != AP_ACCEPT_PATHINFO_UNSET)) {
+        /* No module knew better, and the user coded AcceptPathInfo */
+        r->used_path_info = conf->accept_path_info;
+    }
+
+    return OK;
+}
+
+static int default_handler(request_rec *r)
+{
+    conn_rec *c = r->connection;
+    apr_bucket_brigade *bb;
+    apr_bucket *e;
+    core_dir_config *d;
+    int errstatus;
+    apr_file_t *fd = NULL;
+    apr_status_t status;
+    /* XXX if/when somebody writes a content-md5 filter we either need to
+     *     remove this support or coordinate when to use the filter vs.
+     *     when to use this code
+     *     The current choice of when to compute the md5 here matches the 1.3
+     *     support fairly closely (unlike 1.3, we don't handle computing md5
+     *     when the charset is translated).
+     */
+    int bld_content_md5;
+
+    d = (core_dir_config *)ap_get_core_module_config(r->per_dir_config);
+    bld_content_md5 = (d->content_md5 == AP_CONTENT_MD5_ON)
+                      && r->output_filters->frec->ftype != AP_FTYPE_RESOURCE;
+
+    ap_allow_standard_methods(r, MERGE_ALLOW, M_GET, M_OPTIONS, M_POST, -1);
+
+    /* If filters intend to consume the request body, they must
+     * register an InputFilter to slurp the contents of the POST
+     * data from the POST input stream.  It no longer exists when
+     * the output filters are invoked by the default handler.
+     */
+    if ((errstatus = ap_discard_request_body(r)) != OK) {
+        return errstatus;
+    }
+
+    if (r->method_number == M_GET || r->method_number == M_POST) {
+        if (r->finfo.filetype == APR_NOFILE) {
+            ap_log_rerror(APLOG_MARK, APLOG_INFO, 0, r, APLOGNO(00128)
+                          "File does not exist: %s",
+                          apr_pstrcat(r->pool, r->filename, r->path_info, NULL));
+            return HTTP_NOT_FOUND;
+        }
+
+        /* Don't try to serve a dir.  Some OSs do weird things with
+         * raw I/O on a dir.
+         */
+        if (r->finfo.filetype == APR_DIR) {
+            ap_log_rerror(APLOG_MARK, APLOG_INFO, 0, r, APLOGNO(00129)
+                          "Attempt to serve directory: %s", r->filename);
+            return HTTP_NOT_FOUND;
+        }
+
+        if ((r->used_path_info != AP_REQ_ACCEPT_PATH_INFO) &&
+            r->path_info && *r->path_info)
+        {
+            /* default to reject */
+            ap_log_rerror(APLOG_MARK, APLOG_INFO, 0, r, APLOGNO(00130)
+                          "File does not exist: %s",
+                          apr_pstrcat(r->pool, r->filename, r->path_info, NULL));
+            return HTTP_NOT_FOUND;
+        }
+
+        /* We understood the (non-GET) method, but it might not be legal for
+           this particular resource. Check to see if the 'deliver_script'
+           flag is set. If so, then we go ahead and deliver the file since
+           it isn't really content (only GET normally returns content).
+
+           Note: based on logic further above, the only possible non-GET
+           method at this point is POST. In the future, we should enable
+           script delivery for all methods.  */
+        if (r->method_number != M_GET) {
+            core_request_config *req_cfg;
+
+            req_cfg = ap_get_core_module_config(r->request_config);
+            if (!req_cfg->deliver_script) {
+                /* The flag hasn't been set for this request. Punt. */
+                ap_log_rerror(APLOG_MARK, APLOG_ERR, 0, r, APLOGNO(00131)
+                              "This resource does not accept the %s method.",
+                              r->method);
+                return HTTP_METHOD_NOT_ALLOWED;
+            }
+        }
+
+
+        if ((status = apr_file_open(&fd, r->filename, APR_READ | APR_BINARY
+#if APR_HAS_SENDFILE
+                            | AP_SENDFILE_ENABLED(d->enable_sendfile)
+#endif
+                                    , 0, r->pool)) != APR_SUCCESS) {
+            ap_log_rerror(APLOG_MARK, APLOG_ERR, status, r, APLOGNO(00132)
+                          "file permissions deny server access: %s", r->filename);
+            return HTTP_FORBIDDEN;
+        }
+
+        ap_update_mtime(r, r->finfo.mtime);
+        ap_set_last_modified(r);
+        ap_set_etag_fd(r, fd);
+        ap_set_accept_ranges(r);
+        ap_set_content_length(r, r->finfo.size);
+        if (bld_content_md5) {
+            apr_table_setn(r->headers_out, "Content-MD5",
+                           ap_md5digest(r->pool, fd));
+        }
+
+        bb = apr_brigade_create(r->pool, c->bucket_alloc);
+
+        if ((errstatus = ap_meets_conditions(r)) != OK) {
+            apr_file_close(fd);
+            r->status = errstatus;
+        }
+        else {
+            e = apr_brigade_insert_file(bb, fd, 0, r->finfo.size, r->pool);
+
+#if APR_HAS_MMAP
+            if (d->enable_mmap == ENABLE_MMAP_OFF) {
+                (void)apr_bucket_file_enable_mmap(e, 0);
+            }
+#endif
+#if APR_MAJOR_VERSION > 1 || (APU_MAJOR_VERSION == 1 && APU_MINOR_VERSION >= 6)
+            if (d->read_buf_size) {
+                apr_bucket_file_set_buf_size(e, d->read_buf_size);
+            }
+#endif
+        }
+
+        e = apr_bucket_eos_create(c->bucket_alloc);
+        APR_BRIGADE_INSERT_TAIL(bb, e);
+
+        status = ap_pass_brigade(r->output_filters, bb);
+        apr_brigade_cleanup(bb);
+
+        if (status == APR_SUCCESS
+            || r->status != HTTP_OK
+            || c->aborted) {
+            return OK;
+        }
+        else {
+            /* no way to know what type of error occurred */
+            ap_log_rerror(APLOG_MARK, APLOG_DEBUG, status, r, APLOGNO(00133)
+                          "default_handler: ap_pass_brigade returned %i",
+                          status);
+            return AP_FILTER_ERROR;
+        }
+    }
+    else {              /* unusual method (not GET or POST) */
+        if (r->method_number == M_INVALID) {
+            /* See if this looks like an undecrypted SSL handshake attempt.
+             * It's safe to look a couple bytes into the_request if it exists, as it's
+             * always allocated at least MIN_LINE_ALLOC (80) bytes.
+             */
+            if (r->the_request
+                && r->the_request[0] == 0x16
+                && (r->the_request[1] == 0x2 || r->the_request[1] == 0x3)) {
+                ap_log_rerror(APLOG_MARK, APLOG_ERR, 0, r, APLOGNO(00134)
+                              "Invalid method in request %s - possible attempt to establish SSL connection on non-SSL port", r->the_request);
+            } else {
+                ap_log_rerror(APLOG_MARK, APLOG_ERR, 0, r, APLOGNO(00135)
+                              "Invalid method in request %s", r->the_request);
+            }
+            return HTTP_NOT_IMPLEMENTED;
+        }
+
+        if (r->method_number == M_OPTIONS) {
+            return ap_send_http_options(r);
+        }
+        return HTTP_METHOD_NOT_ALLOWED;
+    }
+}
+
+/* Optional function coming from mod_logio, used for logging of output
+ * traffic
+ */
+APR_OPTIONAL_FN_TYPE(ap_logio_add_bytes_out) *ap__logio_add_bytes_out;
+APR_OPTIONAL_FN_TYPE(authz_some_auth_required) *ap__authz_ap_some_auth_required;
+
+/* Insist that at least one module will undertake to provide system
+ * security by dropping startup privileges.
+ */
+static int sys_privileges = 0;
+AP_DECLARE(int) ap_sys_privileges_handlers(int inc)
+{
+    sys_privileges += inc;
+    return sys_privileges;
+}
+
+static int check_errorlog_dir(apr_pool_t *p, server_rec *s)
+{
+    if (!s->error_fname || s->error_fname[0] == '|'
+        || strcmp(s->error_fname, "syslog") == 0
+        || strncmp(s->error_fname, "syslog:", 7) == 0) {
+        return APR_SUCCESS;
+    }
+    else {
+        char *abs = ap_server_root_relative(p, s->error_fname);
+        char *dir = ap_make_dirstr_parent(p, abs);
+        apr_finfo_t finfo;
+        apr_status_t rv = apr_stat(&finfo, dir, APR_FINFO_TYPE, p);
+        if (rv == APR_SUCCESS && finfo.filetype != APR_DIR)
+            rv = APR_ENOTDIR;
+        if (rv != APR_SUCCESS) {
+            const char *desc = "main error log";
+            if (s->defn_name)
+                desc = apr_psprintf(p, "error log of vhost defined at %s:%d",
+                                    s->defn_name, s->defn_line_number);
+            ap_log_error(APLOG_MARK, APLOG_STARTUP|APLOG_EMERG, rv,
+                          ap_server_conf, APLOGNO(02291)
+                         "Cannot access directory '%s' for %s", dir, desc);
+            return !OK;
+        }
+    }
+    return OK;
+}
+
+static int core_check_config(apr_pool_t *pconf, apr_pool_t *plog, apr_pool_t *ptemp, server_rec *s)
+{
+    int rv = OK;
+    while (s) {
+        if (check_errorlog_dir(ptemp, s) != OK)
+            rv = !OK;
+        s = s->next;
+    }
+    return rv;
+}
+
+
+static int core_pre_config(apr_pool_t *pconf, apr_pool_t *plog, apr_pool_t *ptemp)
+{
+    ap_mutex_init(pconf);
+
+    if (!saved_server_config_defines)
+        init_config_defines(pconf);
+    apr_pool_cleanup_register(pconf, NULL, reset_config_defines,
+                              apr_pool_cleanup_null);
+
+    ap_regcomp_set_default_cflags(AP_REG_DEFAULT);
+
+    mpm_common_pre_config(pconf);
+
+    return OK;
+}
+
+static int core_post_config(apr_pool_t *pconf, apr_pool_t *plog, apr_pool_t *ptemp, server_rec *s)
+{
+    ap__logio_add_bytes_out = APR_RETRIEVE_OPTIONAL_FN(ap_logio_add_bytes_out);
+    ident_lookup = APR_RETRIEVE_OPTIONAL_FN(ap_ident_lookup);
+    ap__authz_ap_some_auth_required = APR_RETRIEVE_OPTIONAL_FN(authz_some_auth_required);
+    authn_ap_auth_type = APR_RETRIEVE_OPTIONAL_FN(authn_ap_auth_type);
+    authn_ap_auth_name = APR_RETRIEVE_OPTIONAL_FN(authn_ap_auth_name);
+    access_compat_ap_satisfies = APR_RETRIEVE_OPTIONAL_FN(access_compat_ap_satisfies);
+
+    set_banner(pconf);
+    ap_setup_make_content_type(pconf);
+    ap_setup_auth_internal(ptemp);
+    ap_setup_ssl_optional_fns(pconf);
+    if (!sys_privileges) {
+        ap_log_error(APLOG_MARK, APLOG_CRIT, 0, NULL, APLOGNO(00136)
+                     "Server MUST relinquish startup privileges before "
+                     "accepting connections.  Please ensure mod_unixd "
+                     "or other system security module is loaded.");
+        return !OK;
+    }
+    apr_pool_cleanup_register(pconf, NULL, ap_mpm_end_gen_helper,
+                              apr_pool_cleanup_null);
+    return OK;
+}
+
+static void core_insert_filter(request_rec *r)
+{
+    core_dir_config *conf = (core_dir_config *)
+                            ap_get_core_module_config(r->per_dir_config);
+    const char *filter, *filters = conf->output_filters;
+
+    if (filters) {
+        while (*filters && (filter = ap_getword(r->pool, &filters, ';'))) {
+            ap_add_output_filter(filter, NULL, r, r->connection);
+        }
+    }
+
+    filters = conf->input_filters;
+    if (filters) {
+        while (*filters && (filter = ap_getword(r->pool, &filters, ';'))) {
+            ap_add_input_filter(filter, NULL, r, r->connection);
+        }
+    }
+}
+
+static apr_size_t num_request_notes = AP_NUM_STD_NOTES;
+
+static apr_status_t reset_request_notes(void *dummy)
+{
+    num_request_notes = AP_NUM_STD_NOTES;
+    return APR_SUCCESS;
+}
+
+AP_DECLARE(apr_size_t) ap_register_request_note(void)
+{
+    apr_pool_cleanup_register(apr_hook_global_pool, NULL, reset_request_notes,
+                              apr_pool_cleanup_null);
+    return num_request_notes++;
+}
+
+AP_DECLARE(void **) ap_get_request_note(request_rec *r, apr_size_t note_num)
+{
+    core_request_config *req_cfg;
+
+    if (note_num >= num_request_notes) {
+        return NULL;
+    }
+
+    req_cfg = (core_request_config *)
+        ap_get_core_module_config(r->request_config);
+
+    if (!req_cfg) {
+        return NULL;
+    }
+
+    return &(req_cfg->notes[note_num]);
+}
+
+AP_DECLARE(apr_socket_t *) ap_get_conn_socket(conn_rec *c)
+{
+    return ap_get_core_module_config(c->conn_config);
+}
+
+static int core_create_req(request_rec *r)
+{
+    /* Alloc the config struct and the array of request notes in
+     * a single block for efficiency
+     */
+    core_request_config *req_cfg;
+
+    req_cfg = apr_pcalloc(r->pool, sizeof(core_request_config) +
+                          sizeof(void *) * num_request_notes);
+    req_cfg->notes = (void **)((char *)req_cfg + sizeof(core_request_config));
+
+    /* ### temporarily enable script delivery as the default */
+    req_cfg->deliver_script = 1;
+
+    if (r->main) {
+        core_request_config *main_req_cfg = (core_request_config *)
+            ap_get_core_module_config(r->main->request_config);
+        req_cfg->bb = main_req_cfg->bb;
+    }
+    else {
+        req_cfg->bb = apr_brigade_create(r->pool, r->connection->bucket_alloc);
+    }
+
+    ap_set_core_module_config(r->request_config, req_cfg);
+
+    return OK;
+}
+
+static int core_create_proxy_req(request_rec *r, request_rec *pr)
+{
+    return core_create_req(pr);
+}
+
+static conn_rec *core_create_conn(apr_pool_t *ptrans, server_rec *server,
+                                  apr_socket_t *csd, long id, void *sbh,
+                                  apr_bucket_alloc_t *alloc)
+{
+    apr_status_t rv;
+    conn_rec *c = (conn_rec *) apr_pcalloc(ptrans, sizeof(conn_rec));
+
+    c->sbh = sbh;
+    ap_update_child_status(c->sbh, SERVER_BUSY_READ, NULL);
+
+    /* Got a connection structure, so initialize what fields we can
+     * (the rest are zeroed out by pcalloc).
+     */
+    c->pool = ptrans;
+    c->conn_config = ap_create_conn_config(ptrans);
+    c->notes = apr_table_make(ptrans, 5);
+
+    if ((rv = apr_socket_addr_get(&c->local_addr, APR_LOCAL, csd))
+        != APR_SUCCESS) {
+        ap_log_error(APLOG_MARK, APLOG_INFO, rv, server, APLOGNO(00137)
+                     "apr_socket_addr_get(APR_LOCAL)");
+        apr_socket_close(csd);
+        return NULL;
+    }
+    if (apr_sockaddr_ip_get(&c->local_ip, c->local_addr)) {
+#if APR_HAVE_SOCKADDR_UN
+        if (c->local_addr->family == APR_UNIX) {
+            c->local_ip = apr_pstrndup(c->pool, c->local_addr->ipaddr_ptr,
+                                       c->local_addr->ipaddr_len);
+        }
+        else
+#endif
+        c->local_ip = apr_pstrdup(c->pool, "unknown");
+    }
+
+    if ((rv = apr_socket_addr_get(&c->client_addr, APR_REMOTE, csd))
+        != APR_SUCCESS) {
+        ap_log_error(APLOG_MARK, APLOG_INFO, rv, server, APLOGNO(00138)
+                     "apr_socket_addr_get(APR_REMOTE)");
+        apr_socket_close(csd);
+        return NULL;
+    }
+    if (apr_sockaddr_ip_get(&c->client_ip, c->client_addr)) {
+#if APR_HAVE_SOCKADDR_UN
+        if (c->client_addr->family == APR_UNIX) {
+            c->client_ip = apr_pstrndup(c->pool, c->client_addr->ipaddr_ptr,
+                                        c->client_addr->ipaddr_len);
+        }
+        else
+#endif
+        c->client_ip = apr_pstrdup(c->pool, "unknown");
+    }
+
+    c->base_server = server;
+
+    c->id = id;
+    c->bucket_alloc = alloc;
+
+    c->clogging_input_filters = 0;
+
+    return c;
+}
+
+static int core_pre_connection(conn_rec *c, void *csd)
+{
+    core_net_rec *net;
+    apr_status_t rv;
+
+    if (c->master) {
+        return DONE;
+    }
+    
+    net = apr_palloc(c->pool, sizeof(*net));
+    /* The Nagle algorithm says that we should delay sending partial
+     * packets in hopes of getting more data.  We don't want to do
+     * this; we are not telnet.  There are bad interactions between
+     * persistent connections and Nagle's algorithm that have very severe
+     * performance penalties.  (Failing to disable Nagle is not much of a
+     * problem with simple HTTP.)
+     */
+    rv = apr_socket_opt_set(csd, APR_TCP_NODELAY, 1);
+    if (rv != APR_SUCCESS && rv != APR_ENOTIMPL) {
+        /* expected cause is that the client disconnected already,
+         * hence the debug level
+         */
+        ap_log_cerror(APLOG_MARK, APLOG_DEBUG, rv, c, APLOGNO(00139)
+                      "apr_socket_opt_set(APR_TCP_NODELAY)");
+    }
+
+    /* The core filter requires the timeout mode to be set, which
+     * incidentally sets the socket to be nonblocking.  If this
+     * is not initialized correctly, Linux - for example - will
+     * be initially blocking, while Solaris will be non blocking
+     * and any initial read will fail.
+     */
+    rv = apr_socket_timeout_set(csd, c->base_server->timeout);
+    if (rv != APR_SUCCESS) {
+        /* expected cause is that the client disconnected already */
+        ap_log_cerror(APLOG_MARK, APLOG_DEBUG, rv, c, APLOGNO(00140)
+                      "apr_socket_timeout_set");
+    }
+
+    net->c = c;
+    net->in_ctx = NULL;
+    net->out_ctx = NULL;
+    net->client_socket = csd;
+
+    ap_set_core_module_config(net->c->conn_config, csd);
+    ap_add_input_filter_handle(ap_core_input_filter_handle, net, NULL, net->c);
+    ap_add_output_filter_handle(ap_core_output_filter_handle, net, NULL, net->c);
+    return DONE;
+}
+
+AP_DECLARE(int) ap_pre_connection(conn_rec *c, void *csd)
+{
+    int rc = OK;
+
+    rc = ap_run_pre_connection(c, csd);
+    if (rc != OK && rc != DONE) {
+        c->aborted = 1;
+        /*
+         * In case we errored, the pre_connection hook of the core
+         * module maybe did not run (it is APR_HOOK_REALLY_LAST) and
+         * hence we missed to
+         *
+         * - Put the socket in c->conn_config
+         * - Setup core output and input filters
+         * - Set socket options and timeouts
+         *
+         * Hence call it in this case.
+         */
+        if (!ap_get_conn_socket(c)) {
+            core_pre_connection(c, csd);
+        }
+    }
+    return rc;
+}
+
+AP_DECLARE(int) ap_state_query(int query)
+{
+    switch (query) {
+    case AP_SQ_MAIN_STATE:
+        return ap_main_state;
+    case AP_SQ_RUN_MODE:
+        return ap_run_mode;
+    case AP_SQ_CONFIG_GEN:
+        return ap_config_generation;
+    default:
+        return AP_SQ_NOT_SUPPORTED;
+    }
+}
+
+static apr_random_t *rng = NULL;
+#if APR_HAS_THREADS
+static apr_thread_mutex_t *rng_mutex = NULL;
+#endif
+
+static void core_child_init(apr_pool_t *pchild, server_rec *s)
+{
+    apr_proc_t proc;
+#if APR_HAS_THREADS
+    int threaded_mpm;
+    if (ap_mpm_query(AP_MPMQ_IS_THREADED, &threaded_mpm) == APR_SUCCESS
+        && threaded_mpm)
+    {
+        apr_thread_mutex_create(&rng_mutex, APR_THREAD_MUTEX_DEFAULT, pchild);
+    }
+#endif
+    /* The MPMs use plain fork() and not apr_proc_fork(), so we have to call
+     * apr_random_after_fork() manually in the child
+     */
+    proc.pid = getpid();
+    apr_random_after_fork(&proc);
+}
+
+static void core_optional_fn_retrieve(void)
+{
+    ap_init_scoreboard(NULL);
+}
+
+AP_CORE_DECLARE(void) ap_random_parent_after_fork(void)
+{
+    /*
+     * To ensure that the RNG state in the parent changes after the fork, we
+     * pull some data from the RNG and discard it. This ensures that the RNG
+     * states in the children are different even after the pid wraps around.
+     * As we only use apr_random for insecure random bytes, pulling 2 bytes
+     * should be enough.
+     * XXX: APR should probably have some dedicated API to do this, but it
+     * XXX: currently doesn't.
+     */
+    apr_uint16_t data;
+    apr_random_insecure_bytes(rng, &data, sizeof(data));
+}
+
+AP_CORE_DECLARE(void) ap_init_rng(apr_pool_t *p)
+{
+    unsigned char seed[8];
+    apr_status_t rv;
+    rng = apr_random_standard_new(p);
+    do {
+        rv = apr_generate_random_bytes(seed, sizeof(seed));
+        if (rv != APR_SUCCESS)
+            goto error;
+        apr_random_add_entropy(rng, seed, sizeof(seed));
+        rv = apr_random_insecure_ready(rng);
+    } while (rv == APR_ENOTENOUGHENTROPY);
+    if (rv == APR_SUCCESS)
+        return;
+error:
+    ap_log_error(APLOG_MARK, APLOG_CRIT, rv, NULL, APLOGNO(00141)
+                 "Could not initialize random number generator");
+    exit(1);
+}
+
+AP_DECLARE(void) ap_random_insecure_bytes(void *buf, apr_size_t size)
+{
+#if APR_HAS_THREADS
+    if (rng_mutex)
+        apr_thread_mutex_lock(rng_mutex);
+#endif
+    /* apr_random_insecure_bytes can only fail with APR_ENOTENOUGHENTROPY,
+     * and we have ruled that out during initialization. Therefore we don't
+     * need to check the return code.
+     */
+    apr_random_insecure_bytes(rng, buf, size);
+#if APR_HAS_THREADS
+    if (rng_mutex)
+        apr_thread_mutex_unlock(rng_mutex);
+#endif
+}
+
+/*
+ * Finding a random number in a range.
+ *      n' = a + n(b-a+1)/(M+1)
+ * where:
+ *      n' = random number in range
+ *      a  = low end of range
+ *      b  = high end of range
+ *      n  = random number of 0..M
+ *      M  = maxint
+ * Algorithm 'borrowed' from PHP's rand() function.
+ */
+#define RAND_RANGE(__n, __min, __max, __tmax) \
+(__n) = (__min) + (long) ((double) ((__max) - (__min) + 1.0) * ((__n) / ((__tmax) + 1.0)))
+AP_DECLARE(apr_uint32_t) ap_random_pick(apr_uint32_t min, apr_uint32_t max)
+{
+    apr_uint32_t number;
+#if (!__GNUC__ || __GNUC__ >= 5 || (__GNUC__ == 4 && __GNUC_MINOR__ >= 8) || \
+     !__sparc__ || APR_SIZEOF_VOIDP != 8)
+    /* This triggers a gcc bug on sparc/64bit with gcc < 4.8, PR 52900 */
+    if (max < 16384) {
+        apr_uint16_t num16;
+        ap_random_insecure_bytes(&num16, sizeof(num16));
+        RAND_RANGE(num16, min, max, APR_UINT16_MAX);
+        number = num16;
+    }
+    else
+#endif
+    {
+        ap_random_insecure_bytes(&number, sizeof(number));
+        RAND_RANGE(number, min, max, APR_UINT32_MAX);
+    }
+    return number;
+}
+
+static apr_status_t core_insert_network_bucket(conn_rec *c,
+                                               apr_bucket_brigade *bb,
+                                               apr_socket_t *socket)
+{
+    apr_bucket *e = apr_bucket_socket_create(socket, c->bucket_alloc);
+    APR_BRIGADE_INSERT_TAIL(bb, e);
+    return APR_SUCCESS;
+}
+
+static apr_status_t core_dirwalk_stat(apr_finfo_t *finfo, request_rec *r,
+                                      apr_int32_t wanted) 
+{
+    return apr_stat(finfo, r->filename, wanted, r->pool);
+}
+
+static void core_dump_config(apr_pool_t *p, server_rec *s)
+{
+    core_server_config *sconf = ap_get_core_module_config(s->module_config);
+    apr_file_t *out = NULL;
+    const char *tmp;
+    const char **defines;
+    int i;
+    if (!ap_exists_config_define("DUMP_RUN_CFG"))
+        return;
+
+    apr_file_open_stdout(&out, p);
+    apr_file_printf(out, "ServerRoot: \"%s\"\n", ap_server_root);
+    tmp = ap_server_root_relative(p, sconf->ap_document_root);
+    apr_file_printf(out, "Main DocumentRoot: \"%s\"\n", tmp);
+    if (s->error_fname[0] != '|'
+        && strcmp(s->error_fname, "syslog") != 0
+        && strncmp(s->error_fname, "syslog:", 7) != 0)
+        tmp = ap_server_root_relative(p, s->error_fname);
+    else
+        tmp = s->error_fname;
+    apr_file_printf(out, "Main ErrorLog: \"%s\"\n", tmp);
+    if (ap_scoreboard_fname) {
+        tmp = ap_server_root_relative(p, ap_scoreboard_fname);
+        apr_file_printf(out, "ScoreBoardFile: \"%s\"\n", tmp);
+    }
+    ap_dump_mutexes(p, s, out);
+    ap_mpm_dump_pidfile(p, out);
+
+    defines = (const char **)ap_server_config_defines->elts;
+    for (i = 0; i < ap_server_config_defines->nelts; i++) {
+        const char *name = defines[i];
+        const char *val = NULL;
+        if (server_config_defined_vars)
+           val = apr_table_get(server_config_defined_vars, name);
+        if (val)
+            apr_file_printf(out, "Define: %s=%s\n", name, val);
+        else
+            apr_file_printf(out, "Define: %s\n", name);
+    }
+}
+
+static int core_upgrade_handler(request_rec *r)
+{
+    conn_rec *c = r->connection;
+    const char *upgrade;
+
+    if (c->master) {
+        /* Not possible to perform an HTTP/1.1 upgrade from a slave
+         * connection. */
+        return DECLINED;
+    }
+    
+    upgrade = apr_table_get(r->headers_in, "Upgrade");
+    if (upgrade && *upgrade) {
+        const char *conn = apr_table_get(r->headers_in, "Connection");
+        if (ap_find_token(r->pool, conn, "upgrade")) {
+            apr_array_header_t *offers = NULL;
+            const char *err;
+            
+            err = ap_parse_token_list_strict(r->pool, upgrade, &offers, 0);
+            if (err) {
+                ap_log_rerror(APLOG_MARK, APLOG_DEBUG, 0, r, APLOGNO(02910)
+                              "parsing Upgrade header: %s", err);
+                return DECLINED;
+            }
+            
+            if (offers && offers->nelts > 0) {
+                const char *protocol = ap_select_protocol(c, r, NULL, offers);
+                if (protocol && strcmp(protocol, ap_get_protocol(c))) {
+                    ap_log_rerror(APLOG_MARK, APLOG_DEBUG, 0, r, APLOGNO(02909)
+                                  "Upgrade selects '%s'", protocol);
+                    /* Let the client know what we are upgrading to. */
+                    apr_table_clear(r->headers_out);
+                    apr_table_setn(r->headers_out, "Upgrade", protocol);
+                    apr_table_setn(r->headers_out, "Connection", "Upgrade");
+                    
+                    r->status = HTTP_SWITCHING_PROTOCOLS;
+                    r->status_line = ap_get_status_line(r->status);
+                    ap_send_interim_response(r, 1);
+
+                    ap_switch_protocol(c, r, r->server, protocol);
+
+                    /* make sure httpd closes the connection after this */
+                    c->keepalive = AP_CONN_CLOSE;
+                    return DONE;
+                }
+            }
+        }
+    }
+    else if (!c->keepalives) {
+        /* first request on a master connection, if we have protocols other
+         * than the current one enabled here, announce them to the
+         * client. If the client is already talking a protocol with requests
+         * on slave connections, leave it be. */
+        const apr_array_header_t *upgrades;
+        ap_get_protocol_upgrades(c, r, NULL, 0, &upgrades);
+        if (upgrades && upgrades->nelts > 0) {
+            char *protocols = apr_array_pstrcat(r->pool, upgrades, ',');
+            apr_table_setn(r->headers_out, "Upgrade", protocols);
+            apr_table_setn(r->headers_out, "Connection", "Upgrade");
+        }
+    }
+    
+    return DECLINED;
+}
+
+static int core_upgrade_storage(request_rec *r)
+{
+    if ((r->method_number == M_OPTIONS) && r->uri && (r->uri[0] == '*') &&
+        (r->uri[1] == '\0')) {
+        return core_upgrade_handler(r);
+    }
+    return DECLINED;
+}
+
+static void register_hooks(apr_pool_t *p)
+{
+    errorlog_hash = apr_hash_make(p);
+    ap_register_log_hooks(p);
+    ap_register_config_hooks(p);
+    ap_expr_init(p);
+
+    /* create_connection and pre_connection should always be hooked
+     * APR_HOOK_REALLY_LAST by core to give other modules the opportunity
+     * to install alternate network transports and stop other functions
+     * from being run.
+     */
+    ap_hook_create_connection(core_create_conn, NULL, NULL,
+                              APR_HOOK_REALLY_LAST);
+    ap_hook_pre_connection(core_pre_connection, NULL, NULL,
+                           APR_HOOK_REALLY_LAST);
+
+    ap_hook_pre_config(core_pre_config, NULL, NULL, APR_HOOK_REALLY_FIRST);
+    ap_hook_post_config(core_post_config,NULL,NULL,APR_HOOK_REALLY_FIRST);
+    ap_hook_check_config(core_check_config,NULL,NULL,APR_HOOK_FIRST);
+    ap_hook_test_config(core_dump_config,NULL,NULL,APR_HOOK_FIRST);
+    ap_hook_translate_name(ap_core_translate,NULL,NULL,APR_HOOK_REALLY_LAST);
+    ap_hook_map_to_storage(core_upgrade_storage,NULL,NULL,APR_HOOK_REALLY_FIRST);
+    ap_hook_map_to_storage(core_map_to_storage,NULL,NULL,APR_HOOK_REALLY_LAST);
+    ap_hook_open_logs(ap_open_logs,NULL,NULL,APR_HOOK_REALLY_FIRST);
+    ap_hook_child_init(core_child_init,NULL,NULL,APR_HOOK_REALLY_FIRST);
+    ap_hook_child_init(ap_logs_child_init,NULL,NULL,APR_HOOK_MIDDLE);
+    ap_hook_handler(core_upgrade_handler,NULL,NULL,APR_HOOK_REALLY_FIRST);
+    ap_hook_handler(default_handler,NULL,NULL,APR_HOOK_REALLY_LAST);
+    /* FIXME: I suspect we can eliminate the need for these do_nothings - Ben */
+    ap_hook_type_checker(do_nothing,NULL,NULL,APR_HOOK_REALLY_LAST);
+    ap_hook_fixups(core_override_type,NULL,NULL,APR_HOOK_REALLY_FIRST);
+    ap_hook_create_request(core_create_req, NULL, NULL, APR_HOOK_MIDDLE);
+    APR_OPTIONAL_HOOK(proxy, create_req, core_create_proxy_req, NULL, NULL,
+                      APR_HOOK_MIDDLE);
+    ap_hook_pre_mpm(ap_create_scoreboard, NULL, NULL, APR_HOOK_MIDDLE);
+    ap_hook_child_status(ap_core_child_status, NULL, NULL, APR_HOOK_MIDDLE);
+    ap_hook_insert_network_bucket(core_insert_network_bucket, NULL, NULL,
+                                  APR_HOOK_REALLY_LAST);
+    ap_hook_dirwalk_stat(core_dirwalk_stat, NULL, NULL, APR_HOOK_REALLY_LAST);
+    ap_hook_open_htaccess(ap_open_htaccess, NULL, NULL, APR_HOOK_REALLY_LAST);
+    ap_hook_optional_fn_retrieve(core_optional_fn_retrieve, NULL, NULL,
+                                 APR_HOOK_MIDDLE);
+    
+    /* register the core's insert_filter hook and register core-provided
+     * filters
+     */
+    ap_hook_insert_filter(core_insert_filter, NULL, NULL, APR_HOOK_MIDDLE);
+
+    ap_core_input_filter_handle =
+        ap_register_input_filter("CORE_IN", ap_core_input_filter,
+                                 NULL, AP_FTYPE_NETWORK);
+    ap_content_length_filter_handle =
+        ap_register_output_filter("CONTENT_LENGTH", ap_content_length_filter,
+                                  NULL, AP_FTYPE_PROTOCOL);
+    ap_core_output_filter_handle =
+        ap_register_output_filter("CORE", ap_core_output_filter,
+                                  NULL, AP_FTYPE_NETWORK);
+    ap_subreq_core_filter_handle =
+        ap_register_output_filter("SUBREQ_CORE", ap_sub_req_output_filter,
+                                  NULL, AP_FTYPE_CONTENT_SET);
+    ap_old_write_func =
+        ap_register_output_filter("OLD_WRITE", ap_old_write_filter,
+                                  NULL, AP_FTYPE_RESOURCE - 10);
+}
+
+AP_DECLARE_MODULE(core) = {
+    MPM20_MODULE_STUFF,
+    AP_PLATFORM_REWRITE_ARGS_HOOK, /* hook to run before apache parses args */
+    create_core_dir_config,       /* create per-directory config structure */
+    merge_core_dir_configs,       /* merge per-directory config structures */
+    create_core_server_config,    /* create per-server config structure */
+    merge_core_server_configs,    /* merge per-server config structures */
+    core_cmds,                    /* command apr_table_t */
+    register_hooks                /* register hooks */
+};