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diff --git a/src/global/mail_conf_bool.c b/src/global/mail_conf_bool.c
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+/*++
+/* NAME
+/* mail_conf_bool 3
+/* SUMMARY
+/* boolean-valued configuration parameter support
+/* SYNOPSIS
+/* #include <mail_conf.h>
+/*
+/* int get_mail_conf_bool(name, defval)
+/* const char *name;
+/* int defval;
+/*
+/* int get_mail_conf_bool_fn(name, defval)
+/* const char *name;
+/* int (*defval)();
+/*
+/* void set_mail_conf_bool(name, value)
+/* const char *name;
+/* int value;
+/*
+/* void get_mail_conf_bool_table(table)
+/* const CONFIG_BOOL_TABLE *table;
+/*
+/* void get_mail_conf_bool_fn_table(table)
+/* const CONFIG_BOOL_TABLE *table;
+/* DESCRIPTION
+/* This module implements configuration parameter support for
+/* boolean values. The internal representation is zero (false)
+/* and non-zero (true). The external representation is "no"
+/* (false) and "yes" (true). The conversion from external
+/* representation is case insensitive.
+/*
+/* get_mail_conf_bool() looks up the named entry in the global
+/* configuration dictionary. The specified default value is
+/* returned when no value was found.
+/*
+/* get_mail_conf_bool_fn() is similar but specifies a function that
+/* provides the default value. The function is called only
+/* when the default value is needed.
+/*
+/* set_mail_conf_bool() updates the named entry in the global
+/* configuration dictionary. This has no effect on values that
+/* have been looked up earlier via the get_mail_conf_XXX() routines.
+/*
+/* get_mail_conf_bool_table() and get_mail_conf_int_fn_table() initialize
+/* lists of variables, as directed by their table arguments. A table
+/* must be terminated by a null entry.
+/* DIAGNOSTICS
+/* Fatal errors: malformed boolean value.
+/* SEE ALSO
+/* config(3) general configuration
+/* mail_conf_str(3) string-valued configuration parameters
+/* mail_conf_int(3) integer-valued configuration parameters
+/* LICENSE
+/* .ad
+/* .fi
+/* The Secure Mailer license must be distributed with this software.
+/* AUTHOR(S)
+/* Wietse Venema
+/* IBM T.J. Watson Research
+/* P.O. Box 704
+/* Yorktown Heights, NY 10598, USA
+/*--*/
+
+/* System library. */
+
+#include <sys_defs.h>
+#include <stdlib.h>
+#include <string.h>
+
+#ifdef STRCASECMP_IN_STRINGS_H
+#include <strings.h>
+#endif
+
+/* Utility library. */
+
+#include <msg.h>
+#include <dict.h>
+
+/* Global library. */
+
+#include "mail_conf.h"
+
+/* convert_mail_conf_bool - look up and convert boolean parameter value */
+
+static int convert_mail_conf_bool(const char *name, int *intval)
+{
+ const char *strval;
+
+ if ((strval = mail_conf_lookup_eval(name)) == 0) {
+ return (0);
+ } else {
+ if (strcasecmp(strval, CONFIG_BOOL_YES) == 0) {
+ *intval = 1;
+ } else if (strcasecmp(strval, CONFIG_BOOL_NO) == 0) {
+ *intval = 0;
+ } else {
+ msg_fatal("bad boolean configuration: %s = %s", name, strval);
+ }
+ return (1);
+ }
+}
+
+/* get_mail_conf_bool - evaluate boolean-valued configuration variable */
+
+int get_mail_conf_bool(const char *name, int defval)
+{
+ int intval;
+
+ if (convert_mail_conf_bool(name, &intval) == 0)
+ set_mail_conf_bool(name, intval = defval);
+ return (intval);
+}
+
+/* get_mail_conf_bool_fn - evaluate boolean-valued configuration variable */
+
+typedef int (*stupid_indent_int) (void);
+
+int get_mail_conf_bool_fn(const char *name, stupid_indent_int defval)
+{
+ int intval;
+
+ if (convert_mail_conf_bool(name, &intval) == 0)
+ set_mail_conf_bool(name, intval = defval());
+ return (intval);
+}
+
+/* set_mail_conf_bool - update boolean-valued configuration dictionary entry */
+
+void set_mail_conf_bool(const char *name, int value)
+{
+ mail_conf_update(name, value ? CONFIG_BOOL_YES : CONFIG_BOOL_NO);
+}
+
+/* get_mail_conf_bool_table - look up table of booleans */
+
+void get_mail_conf_bool_table(const CONFIG_BOOL_TABLE *table)
+{
+ while (table->name) {
+ table->target[0] = get_mail_conf_bool(table->name, table->defval);
+ table++;
+ }
+}
+
+/* get_mail_conf_bool_fn_table - look up booleans, defaults are functions */
+
+void get_mail_conf_bool_fn_table(const CONFIG_BOOL_FN_TABLE *table)
+{
+ while (table->name) {
+ table->target[0] = get_mail_conf_bool_fn(table->name, table->defval);
+ table++;
+ }
+}