Merging upstream version 1.30.0.

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

9 files changed, 249 insertions, 165 deletions

diff --git a/daemon/README.md b/daemon/README.md
index ec1f1c7cc..359b3ea39 100644
--- a/daemon/README.md
+++ b/daemon/README.md
@@ -395,10 +395,10 @@ all programs), edit `netdata.conf` and set:
   process nice level = -1
 ```
 
-then execute this to restart netdata:
+then execute this to [restart Netdata](/docs/configure/start-stop-restart.md):
 
 ```sh
-sudo service netdata restart
+sudo systemctl restart netdata
 ```
 
 #### Example 2: Netdata with nice -1 on systemd systems
diff --git a/daemon/anonymous-statistics.sh.in b/daemon/anonymous-statistics.sh.in
index f0d9c10ef..47004f3d0 100755
--- a/daemon/anonymous-statistics.sh.in
+++ b/daemon/anonymous-statistics.sh.in
@@ -26,79 +26,66 @@ fi
 NETDATA_VERSION=$(echo "${NETDATA_VERSION}" | sed 's/-.*//g' | tr -d 'v')
 
 # -------------------------------------------------------------------------------------------------
-# send the anonymous statistics to GA
-# https://developers.google.com/analytics/devguides/collection/protocol/v1/parameters
-# The maximum index for a cd parameter is 20 so we have effectively run out.
+
+# define body of request to be sent
+REQ_BODY="$(cat << EOF
+{
+    "api_key": "mqkwGT0JNFqO-zX2t0mW6Tec9yooaVu7xCBlXtHnt5Y",
+    "event": "${ACTION} ${ACTION_RESULT}",
+    "properties": {
+        "distinct_id": "${NETDATA_REGISTRY_UNIQUE_ID}",
+        "\$current_url": "agent backend",
+        "\$pathname": "netdata-backend",
+        "\$host": "backend.netdata.io",
+        "\$ip": "127.0.0.1",
+        "event_source": "agent backend",
+        "action": "${ACTION}",
+        "action_result": "${ACTION_RESULT}",
+        "action_data": "${ACTION_DATA}",
+        "netdata_machine_guid": "${NETDATA_REGISTRY_UNIQUE_ID}",
+        "netdata_version": "${NETDATA_VERSION}",
+        "host_os_name": "${NETDATA_HOST_OS_NAME}",
+        "host_os_id": "${NETDATA_HOST_OS_ID}",
+        "host_os_id_like": "${NETDATA_HOST_OS_ID_LIKE}",
+        "host_os_version": "${NETDATA_HOST_OS_VERSION}",
+        "host_os_version_id": "${NETDATA_HOST_OS_VERSION_ID}",
+        "host_os_detection": "${NETDATA_HOST_OS_DETECTION}",
+        "host_is_k8s_node": "${NETDATA_HOST_IS_K8S_NODE}",
+        "system_kernel_name": "${NETDATA_SYSTEM_KERNEL_NAME}",
+        "system_kernel_version": "${NETDATA_SYSTEM_KERNEL_VERSION}",
+        "system_architecture": "${NETDATA_SYSTEM_ARCHITECTURE}",
+        "system_virtualization": "${NETDATA_SYSTEM_VIRTUALIZATION}",
+        "system_virt_detection": "${NETDATA_SYSTEM_VIRT_DETECTION}",
+        "system_container": "${NETDATA_SYSTEM_CONTAINER}",
+        "system_container_detection": "${NETDATA_SYSTEM_CONTAINER_DETECTION}",
+        "container_os_name": "${NETDATA_CONTAINER_OS_NAME}",
+        "container_os_id": "${NETDATA_CONTAINER_OS_ID}",
+        "container_os_id_like": "${NETDATA_CONTAINER_OS_ID_LIKE}",
+        "container_os_version": "${NETDATA_CONTAINER_OS_VERSION}",
+        "container_os_version_id": "${NETDATA_CONTAINER_OS_VERSION_ID}",
+        "container_os_detection": "${NETDATA_CONTAINER_OS_DETECTION}",
+        "system_cpu_detection": "${NETDATA_SYSTEM_CPU_DETECTION}",
+        "system_cpu_freq": "${NETDATA_SYSTEM_CPU_FREQ}",
+        "system_cpu_logical_cpu_count": "${NETDATA_SYSTEM_CPU_LOGICAL_CPU_COUNT}",
+        "system_cpu_model": "${NETDATA_SYSTEM_CPU_MODEL}",
+        "system_cpu_vendor": "${NETDATA_SYSTEM_CPU_VENDOR}",
+        "system_disk_detection": "${NETDATA_SYSTEM_DISK_DETECTION}",
+        "system_ram_detection": "${NETDATA_SYSTEM_RAM_DETECTION}",
+        "system_total_disk_size": "${NETDATA_SYSTEM_TOTAL_DISK_SIZE}",
+        "system_total_ram": "${NETDATA_SYSTEM_TOTAL_RAM}"
+  }
+}
+EOF
+)"
+
+# send the anonymous statistics to the Netdata PostHog
 if [ -n "$(command -v curl 2> /dev/null)" ]; then
-  curl -X POST -Ss --max-time 2 \
-    --data "v=1" \
-    --data "tid=UA-64295674-3" \
-    --data "aip=1" \
-    --data "ds=shell" \
-    --data-urlencode "cid=${NETDATA_REGISTRY_UNIQUE_ID}" \
-    --data-urlencode "cs=${NETDATA_REGISTRY_UNIQUE_ID}" \
-    --data "t=event" \
-    --data "ni=1" \
-    --data "an=anonymous-statistics" \
-    --data-urlencode "av=${NETDATA_VERSION}" \
-    --data-urlencode "ec=${ACTION}" \
-    --data-urlencode "ea=${ACTION_RESULT}" \
-    --data-urlencode "el=${ACTION_DATA}" \
-    --data-urlencode "cd1=${NETDATA_HOST_OS_NAME}" \
-    --data-urlencode "cd2=${NETDATA_HOST_OS_ID}" \
-    --data-urlencode "cd3=${NETDATA_HOST_OS_ID_LIKE}" \
-    --data-urlencode "cd4=${NETDATA_HOST_OS_VERSION}" \
-    --data-urlencode "cd5=${NETDATA_HOST_OS_VERSION_ID}" \
-    --data-urlencode "cd6=${NETDATA_HOST_OS_DETECTION}" \
-    --data-urlencode "cd7=${NETDATA_SYSTEM_KERNEL_NAME}" \
-    --data-urlencode "cd8=${NETDATA_SYSTEM_KERNEL_VERSION}" \
-    --data-urlencode "cd9=${NETDATA_SYSTEM_ARCHITECTURE}" \
-    --data-urlencode "cd10=${NETDATA_SYSTEM_VIRTUALIZATION}" \
-    --data-urlencode "cd11=${NETDATA_SYSTEM_VIRT_DETECTION}" \
-    --data-urlencode "cd12=${NETDATA_SYSTEM_CONTAINER}" \
-    --data-urlencode "cd13=${NETDATA_SYSTEM_CONTAINER_DETECTION}" \
-    --data-urlencode "cd14=${NETDATA_CONTAINER_OS_NAME}" \
-    --data-urlencode "cd15=${NETDATA_CONTAINER_OS_ID}" \
-    --data-urlencode "cd16=${NETDATA_CONTAINER_OS_ID_LIKE}" \
-    --data-urlencode "cd17=${NETDATA_CONTAINER_OS_VERSION}" \
-    --data-urlencode "cd18=${NETDATA_CONTAINER_OS_VERSION_ID}" \
-    --data-urlencode "cd19=${NETDATA_CONTAINER_OS_DETECTION}" \
-    --data-urlencode "cd20=${NETDATA_HOST_IS_K8S_NODE}" \
-    "https://www.google-analytics.com/collect" > /dev/null 2>&1
+  curl -X POST --header "Content-Type: application/json" -d "${REQ_BODY}" https://posthog.netdata.cloud/capture/ > /dev/null 2>&1
 else
-  wget -q -O - --timeout=1 "https://www.google-analytics.com/collect?\
-&v=1\
-&tid=UA-64295674-3\
-&aip=1\
-&ds=shell\
-&cid=${NETDATA_REGISTRY_UNIQUE_ID}\
-&cs=${NETDATA_REGISTRY_UNIQUE_ID}\
-&t=event\
-&ni=1\
-&an=anonymous-statistics\
-&av=${NETDATA_VERSION}\
-&ec=${ACTION}\
-&ea=${ACTION_RESULT}\
-&el=${ACTION_DATA}\
-&cd1=${NETDATA_HOST_OS_NAME}\
-&cd2=${NETDATA_HOST_OS_ID}\
-&cd3=${NETDATA_HOST_OS_ID_LIKE}\
-&cd4=${NETDATA_HOST_OS_VERSION}\
-&cd5=${NETDATA_HOST_OS_VERSION_ID}\
-&cd6=${NETDATA_HOST_OS_DETECTION}\
-&cd7=${NETDATA_SYSTEM_KERNEL_NAME}\
-&cd8=${NETDATA_SYSTEM_KERNEL_VERSION}\
-&cd9=${NETDATA_SYSTEM_ARCHITECTURE}\
-&cd10=${NETDATA_SYSTEM_VIRTUALIZATION}\
-&cd11=${NETDATA_SYSTEM_VIRT_DETECTION}\
-&cd12=${NETDATA_SYSTEM_CONTAINER}\
-&cd13=${NETDATA_SYSTEM_CONTAINER_DETECTION}\
-&cd14=${NETDATA_CONTAINER_OS_NAME} \
-&cd15=${NETDATA_CONTAINER_OS_ID} \
-&cd16=${NETDATA_CONTAINER_OS_ID_LIKE} \
-&cd17=${NETDATA_CONTAINER_OS_VERSION} \
-&cd18=${NETDATA_CONTAINER_OS_VERSION_ID} \
-&cd19=${NETDATA_CONTAINER_OS_DETECTION} \
-&cd20=${NETDATA_HOST_IS_K8S_NODE} \
-" > /dev/null 2>&1
+  wget -q -O - --no-check-certificate \
+  --method POST \
+  --timeout=1 \
+  --header 'Content-Type: application/json' \
+  --body-data "${REQ_BODY}" \
+   'https://posthog.netdata.cloud/capture/' > /dev/null 2>&1
 fi
diff --git a/daemon/buildinfo.c b/daemon/buildinfo.c
index de02a72e1..b16390544 100644
--- a/daemon/buildinfo.c
+++ b/daemon/buildinfo.c
@@ -6,224 +6,309 @@
 // Optional features
 
 #ifdef ENABLE_ACLK
-#define FEAT_CLOUD "YES"
+#define FEAT_CLOUD 1
+#define FEAT_CLOUD_MSG ""
+#ifdef ACLK_NG
+#define ACLK_IMPL "Next Generation"
 #else
+#define ACLK_IMPL "Legacy"
+#endif
+#else
+#define ACLK_IMPL ""
 #ifdef DISABLE_CLOUD
-#define FEAT_CLOUD "NO (by user request e.g. '--disable-cloud')"
+#define FEAT_CLOUD 0
+#define FEAT_CLOUD_MSG "(by user request)"
 #else
-#define FEAT_CLOUD "NO"
+#define FEAT_CLOUD 0
+#define FEAT_CLOUD_MSG ""
 #endif
 #endif
 
 #ifdef ENABLE_DBENGINE
-#define FEAT_DBENGINE "YES"
+#define FEAT_DBENGINE 1
 #else
-#define FEAT_DBENGINE "NO"
+#define FEAT_DBENGINE 0
 #endif
 
 #if defined(HAVE_X509_VERIFY_PARAM_set1_host) && HAVE_X509_VERIFY_PARAM_set1_host == 1
-#define FEAT_TLS_HOST_VERIFY "YES"
+#define FEAT_TLS_HOST_VERIFY 1
 #else
-#define FEAT_TLS_HOST_VERIFY "NO"
+#define FEAT_TLS_HOST_VERIFY 0
 #endif
 
 #ifdef ENABLE_HTTPS
-#define FEAT_NATIVE_HTTPS "YES"
+#define FEAT_NATIVE_HTTPS 1
 #else
-#define FEAT_NATIVE_HTTPS "NO"
+#define FEAT_NATIVE_HTTPS 0
 #endif
 
 // Optional libraries
 
 #ifdef ENABLE_JSONC
-#define FEAT_JSONC "YES"
+#define FEAT_JSONC 1
 #else
-#define FEAT_JSONC "NO"
+#define FEAT_JSONC 0
 #endif
 
 #ifdef ENABLE_JEMALLOC
-#define FEAT_JEMALLOC "YES"
+#define FEAT_JEMALLOC 1
 #else
-#define FEAT_JEMALLOC "NO"
+#define FEAT_JEMALLOC 0
 #endif
 
 #ifdef ENABLE_TCMALLOC
-#define FEAT_TCMALLOC "YES"
+#define FEAT_TCMALLOC 1
 #else
-#define FEAT_TCMALLOC "NO"
+#define FEAT_TCMALLOC 0
 #endif
 
 #ifdef HAVE_CAPABILITY
-#define FEAT_LIBCAP "YES"
+#define FEAT_LIBCAP 1
 #else
-#define FEAT_LIBCAP "NO"
+#define FEAT_LIBCAP 0
 #endif
 
+#ifndef ACLK_NG
 #ifdef ACLK_NO_LIBMOSQ
-#define FEAT_MOSQUITTO "NO"
+#define FEAT_MOSQUITTO 0
 #else
-#define FEAT_MOSQUITTO "YES"
+#define FEAT_MOSQUITTO 1
 #endif
 
 #ifdef ACLK_NO_LWS
-#define FEAT_LWS "NO"
+#define FEAT_LWS 0
+#define FEAT_LWS_MSG ""
 #else
 #ifdef ENABLE_ACLK
 #include <libwebsockets.h>
 #endif
 #ifdef BUNDLED_LWS
-#define FEAT_LWS "YES static"
+#define FEAT_LWS 1
+#define FEAT_LWS_MSG "static"
 #else
-#define FEAT_LWS "YES shared-lib"
+#define FEAT_LWS 1
+#define FEAT_LWS_MSG "shared-lib"
 #endif
 #endif
+#endif /* ACLK_NG */
 
 #ifdef NETDATA_WITH_ZLIB
-#define FEAT_ZLIB "YES"
+#define FEAT_ZLIB 1
 #else
-#define FEAT_ZLIB "NO"
+#define FEAT_ZLIB 0
 #endif
 
 #ifdef STORAGE_WITH_MATH
-#define FEAT_LIBM "YES"
+#define FEAT_LIBM 1
 #else
-#define FEAT_LIBM "NO"
+#define FEAT_LIBM 0
 #endif
 
 #ifdef HAVE_CRYPTO
-#define FEAT_CRYPTO "YES"
+#define FEAT_CRYPTO 1
 #else
-#define FEAT_CRYPTO "NO"
+#define FEAT_CRYPTO 0
 #endif
 
 // Optional plugins
 
 #ifdef ENABLE_APPS_PLUGIN
-#define FEAT_APPS_PLUGIN "YES"
+#define FEAT_APPS_PLUGIN 1
 #else
-#define FEAT_APPS_PLUGIN "NO"
+#define FEAT_APPS_PLUGIN 0
 #endif
 
 #ifdef HAVE_FREEIPMI
-#define FEAT_IPMI "YES"
+#define FEAT_IPMI 1
 #else
-#define FEAT_IPMI "NO"
+#define FEAT_IPMI 0
 #endif
 
 #ifdef HAVE_CUPS
-#define FEAT_CUPS "YES"
+#define FEAT_CUPS 1
 #else
-#define FEAT_CUPS "NO"
+#define FEAT_CUPS 0
 #endif
 
-#ifdef HAVE_LIBMNL
-#define FEAT_NFACCT "YES"
+#ifdef HAVE_NFACCT
+#define FEAT_NFACCT 1
 #else
-#define FEAT_NFACCT "NO"
+#define FEAT_NFACCT 0
 #endif
 
 #ifdef HAVE_LIBXENSTAT
-#define FEAT_XEN "YES"
+#define FEAT_XEN 1
 #else
-#define FEAT_XEN "NO"
+#define FEAT_XEN 0
 #endif
 
 #ifdef HAVE_XENSTAT_VBD_ERROR
-#define FEAT_XEN_VBD_ERROR "YES"
+#define FEAT_XEN_VBD_ERROR 1
 #else
-#define FEAT_XEN_VBD_ERROR "NO"
+#define FEAT_XEN_VBD_ERROR 0
 #endif
 
 #ifdef HAVE_LIBBPF
-#define FEAT_EBPF "YES"
+#define FEAT_EBPF 1
 #else
-#define FEAT_EBPF "NO"
+#define FEAT_EBPF 0
 #endif
 
 #ifdef HAVE_SETNS
-#define FEAT_CGROUP_NET "YES"
+#define FEAT_CGROUP_NET 1
 #else
-#define FEAT_CGROUP_NET "NO"
+#define FEAT_CGROUP_NET 0
 #endif
 
 #ifdef ENABLE_PERF_PLUGIN
-#define FEAT_PERF "YES"
+#define FEAT_PERF 1
 #else
-#define FEAT_PERF "NO"
+#define FEAT_PERF 0
 #endif
 
 #ifdef ENABLE_SLABINFO
-#define FEAT_SLABINFO "YES"
+#define FEAT_SLABINFO 1
 #else
-#define FEAT_SLABINFO "NO"
+#define FEAT_SLABINFO 0
 #endif
 
 // Optional Exporters
 
 #ifdef HAVE_KINESIS
-#define FEAT_KINESIS "YES"
+#define FEAT_KINESIS 1
 #else
-#define FEAT_KINESIS "NO"
+#define FEAT_KINESIS 0
 #endif
 
 #ifdef ENABLE_EXPORTING_PUBSUB
-#define FEAT_PUBSUB "YES"
+#define FEAT_PUBSUB 1
 #else
-#define FEAT_PUBSUB "NO"
+#define FEAT_PUBSUB 0
 #endif
 
 #ifdef HAVE_MONGOC
-#define FEAT_MONGO "YES"
+#define FEAT_MONGO 1
 #else
-#define FEAT_MONGO "NO"
+#define FEAT_MONGO 0
 #endif
 
 #ifdef ENABLE_PROMETHEUS_REMOTE_WRITE
-#define FEAT_REMOTE_WRITE "YES"
+#define FEAT_REMOTE_WRITE 1
 #else
-#define FEAT_REMOTE_WRITE "NO"
+#define FEAT_REMOTE_WRITE 0
 #endif
 
+#define FEAT_YES_NO(x) ((x) ? "YES" : "NO")
 
 void print_build_info(void) {
     printf("Configure options: %s\n", CONFIGURE_COMMAND);
 
     printf("Features:\n");
-    printf("    dbengine:                %s\n", FEAT_DBENGINE);
-    printf("    Native HTTPS:            %s\n", FEAT_NATIVE_HTTPS);
-    printf("    Netdata Cloud:           %s\n", FEAT_CLOUD);
-    printf("    TLS Host Verification:   %s\n", FEAT_TLS_HOST_VERIFY);
+    printf("    dbengine:                %s\n", FEAT_YES_NO(FEAT_DBENGINE));
+    printf("    Native HTTPS:            %s\n", FEAT_YES_NO(FEAT_NATIVE_HTTPS));
+    printf("    Netdata Cloud:           %s %s\n", FEAT_YES_NO(FEAT_CLOUD), FEAT_CLOUD_MSG);
+#if FEAT_CLOUD == 1
+    printf("    Cloud Implementation:    %s\n", ACLK_IMPL);
+#endif
+    printf("    TLS Host Verification:   %s\n", FEAT_YES_NO(FEAT_TLS_HOST_VERIFY));
 
     printf("Libraries:\n");
-    printf("    jemalloc:                %s\n", FEAT_JEMALLOC);
-    printf("    JSON-C:                  %s\n", FEAT_JSONC);
-    printf("    libcap:                  %s\n", FEAT_LIBCAP);
-    printf("    libcrypto:               %s\n", FEAT_CRYPTO);
-    printf("    libm:                    %s\n", FEAT_LIBM);
+    printf("    jemalloc:                %s\n", FEAT_YES_NO(FEAT_JEMALLOC));
+    printf("    JSON-C:                  %s\n", FEAT_YES_NO(FEAT_JSONC));
+    printf("    libcap:                  %s\n", FEAT_YES_NO(FEAT_LIBCAP));
+    printf("    libcrypto:               %s\n", FEAT_YES_NO(FEAT_CRYPTO));
+    printf("    libm:                    %s\n", FEAT_YES_NO(FEAT_LIBM));
+#ifndef ACLK_NG
 #if defined(ENABLE_ACLK)
-    printf("    LWS:                     %s v%d.%d.%d\n", FEAT_LWS, LWS_LIBRARY_VERSION_MAJOR, LWS_LIBRARY_VERSION_MINOR, LWS_LIBRARY_VERSION_PATCH);
+    printf("    LWS:                     %s %s v%d.%d.%d\n", FEAT_YES_NO(FEAT_LWS), FEAT_LWS_MSG, LWS_LIBRARY_VERSION_MAJOR, LWS_LIBRARY_VERSION_MINOR, LWS_LIBRARY_VERSION_PATCH);
 #else
-    printf("    LWS:                     %s\n", FEAT_LWS);
+    printf("    LWS:                     %s %s\n", FEAT_YES_NO(FEAT_LWS), FEAT_LWS_MSG);
+#endif
+    printf("    mosquitto:               %s\n", FEAT_YES_NO(FEAT_MOSQUITTO));
 #endif
-    printf("    mosquitto:               %s\n", FEAT_MOSQUITTO);
-    printf("    tcalloc:                 %s\n", FEAT_TCMALLOC);
-    printf("    zlib:                    %s\n", FEAT_ZLIB);
+    printf("    tcalloc:                 %s\n", FEAT_YES_NO(FEAT_TCMALLOC));
+    printf("    zlib:                    %s\n", FEAT_YES_NO(FEAT_ZLIB));
 
     printf("Plugins:\n");
-    printf("    apps:                    %s\n", FEAT_APPS_PLUGIN);
-    printf("    cgroup Network Tracking: %s\n", FEAT_CGROUP_NET);
-    printf("    CUPS:                    %s\n", FEAT_CUPS);
-    printf("    EBPF:                    %s\n", FEAT_EBPF);
-    printf("    IPMI:                    %s\n", FEAT_IPMI);
-    printf("    NFACCT:                  %s\n", FEAT_NFACCT);
-    printf("    perf:                    %s\n", FEAT_PERF);
-    printf("    slabinfo:                %s\n", FEAT_SLABINFO);
-    printf("    Xen:                     %s\n", FEAT_XEN);
-    printf("    Xen VBD Error Tracking:  %s\n", FEAT_XEN_VBD_ERROR);
+    printf("    apps:                    %s\n", FEAT_YES_NO(FEAT_APPS_PLUGIN));
+    printf("    cgroup Network Tracking: %s\n", FEAT_YES_NO(FEAT_CGROUP_NET));
+    printf("    CUPS:                    %s\n", FEAT_YES_NO(FEAT_CUPS));
+    printf("    EBPF:                    %s\n", FEAT_YES_NO(FEAT_EBPF));
+    printf("    IPMI:                    %s\n", FEAT_YES_NO(FEAT_IPMI));
+    printf("    NFACCT:                  %s\n", FEAT_YES_NO(FEAT_NFACCT));
+    printf("    perf:                    %s\n", FEAT_YES_NO(FEAT_PERF));
+    printf("    slabinfo:                %s\n", FEAT_YES_NO(FEAT_SLABINFO));
+    printf("    Xen:                     %s\n", FEAT_YES_NO(FEAT_XEN));
+    printf("    Xen VBD Error Tracking:  %s\n", FEAT_YES_NO(FEAT_XEN_VBD_ERROR));
 
     printf("Exporters:\n");
-    printf("    AWS Kinesis:             %s\n", FEAT_KINESIS);
-    printf("    GCP PubSub:              %s\n", FEAT_PUBSUB);
-    printf("    MongoDB:                 %s\n", FEAT_MONGO);
-    printf("    Prometheus Remote Write: %s\n", FEAT_REMOTE_WRITE);
+    printf("    AWS Kinesis:             %s\n", FEAT_YES_NO(FEAT_KINESIS));
+    printf("    GCP PubSub:              %s\n", FEAT_YES_NO(FEAT_PUBSUB));
+    printf("    MongoDB:                 %s\n", FEAT_YES_NO(FEAT_MONGO));
+    printf("    Prometheus Remote Write: %s\n", FEAT_YES_NO(FEAT_REMOTE_WRITE));
+};
+
+
+#define FEAT_JSON_BOOL(x) ((x) ? "true" : "false")
+// This intentionally does not use JSON-C so it works even if JSON-C is not present
+// This is used for anonymous statistics reporting, so it intentionally
+// does not include the configure options, which would be very easy to use
+// for tracking custom builds (and complicate outputting valid JSON).
+void print_build_info_json(void) {
+    printf("{\n");
+    printf("  \"features\": {\n");
+    printf("    \"dbengine\": %s,\n",         FEAT_JSON_BOOL(FEAT_DBENGINE));
+    printf("    \"native-https\": %s,\n",     FEAT_JSON_BOOL(FEAT_NATIVE_HTTPS));
+    printf("    \"cloud\": %s,\n",            FEAT_JSON_BOOL(FEAT_CLOUD));
+#ifdef DISABLE_CLOUD
+    printf("    \"cloud-disabled\": true,\n");
+#else
+    printf("    \"cloud-disabled\": false,\n");
+#endif
+#if FEAT_CLOUD == 1
+    printf("    \"cloud-implementation\": \"%s\",\n", ACLK_IMPL);
+#endif
+    printf("    \"tls-host-verify\": %s\n",   FEAT_JSON_BOOL(FEAT_TLS_HOST_VERIFY));
+    printf("  },\n");
+
+    printf("  \"libs\": {\n");
+    printf("    \"jemalloc\": %s,\n",         FEAT_JSON_BOOL(FEAT_JEMALLOC));
+    printf("    \"jsonc\": %s,\n",            FEAT_JSON_BOOL(FEAT_JSONC));
+    printf("    \"libcap\": %s,\n",           FEAT_JSON_BOOL(FEAT_LIBCAP));
+    printf("    \"libcrypto\": %s,\n",        FEAT_JSON_BOOL(FEAT_CRYPTO));
+    printf("    \"libm\": %s,\n",             FEAT_JSON_BOOL(FEAT_LIBM));
+#ifndef ACLK_NG
+#if defined(ENABLE_ACLK)
+    printf("    \"lws\": %s,\n", FEAT_JSON_BOOL(FEAT_LWS));
+    printf("    \"lws-version\": \"%d.%d.%d\",\n", LWS_LIBRARY_VERSION_MAJOR, LWS_LIBRARY_VERSION_MINOR, LWS_LIBRARY_VERSION_PATCH);
+    printf("    \"lws-type\": \"%s\",\n", FEAT_LWS_MSG);
+#else
+    printf("    \"lws\": %s,\n",              FEAT_JSON_BOOL(FEAT_LWS));
+#endif
+    printf("    \"mosquitto\": %s,\n",        FEAT_JSON_BOOL(FEAT_MOSQUITTO));
+#endif
+    printf("    \"tcmalloc\": %s,\n",         FEAT_JSON_BOOL(FEAT_TCMALLOC));
+    printf("    \"zlib\": %s\n",              FEAT_JSON_BOOL(FEAT_ZLIB));
+    printf("  },\n");
+
+    printf("  \"plugins\": {\n");
+    printf("    \"apps\": %s,\n",             FEAT_JSON_BOOL(FEAT_APPS_PLUGIN));
+    printf("    \"cgroup-net\": %s,\n",       FEAT_JSON_BOOL(FEAT_CGROUP_NET));
+    printf("    \"cups\": %s,\n",             FEAT_JSON_BOOL(FEAT_CUPS));
+    printf("    \"ebpf\": %s,\n",             FEAT_JSON_BOOL(FEAT_EBPF));
+    printf("    \"ipmi\": %s,\n",             FEAT_JSON_BOOL(FEAT_IPMI));
+    printf("    \"nfacct\": %s,\n",           FEAT_JSON_BOOL(FEAT_NFACCT));
+    printf("    \"perf\": %s,\n",             FEAT_JSON_BOOL(FEAT_PERF));
+    printf("    \"slabinfo\": %s,\n",         FEAT_JSON_BOOL(FEAT_SLABINFO));
+    printf("    \"xen\": %s,\n",              FEAT_JSON_BOOL(FEAT_XEN));
+    printf("    \"xen-vbd-error\": %s\n",     FEAT_JSON_BOOL(FEAT_XEN_VBD_ERROR));
+    printf("  },\n");
+
+    printf("  \"exporters\": {\n");
+    printf("    \"kinesis\": %s,\n",          FEAT_JSON_BOOL(FEAT_KINESIS));
+    printf("    \"pubsub\": %s,\n",           FEAT_JSON_BOOL(FEAT_PUBSUB));
+    printf("    \"mongodb\": %s,\n",          FEAT_JSON_BOOL(FEAT_MONGO));
+    printf("    \"prom-remote-write\": %s\n", FEAT_JSON_BOOL(FEAT_REMOTE_WRITE));
+    printf("  }\n");
+    printf("}\n");
 };
diff --git a/daemon/buildinfo.h b/daemon/buildinfo.h
index 76912ea67..05e5efb5a 100644
--- a/daemon/buildinfo.h
+++ b/daemon/buildinfo.h
@@ -5,4 +5,6 @@
 
 extern void print_build_info(void);
 
+extern void print_build_info_json(void);
+
 #endif // NETDATA_BUILDINFO_H
diff --git a/daemon/common.h b/daemon/common.h
index 68af95740..1a58ddda8 100644
--- a/daemon/common.h
+++ b/daemon/common.h
@@ -66,7 +66,11 @@
 #include "claim/claim.h"
 
 // netdata agent cloud link
+#ifndef ACLK_NG
 #include "aclk/legacy/agent_cloud_link.h"
+#else
+#include "aclk/aclk.h"
+#endif
 
 // global GUID map functions
 
diff --git a/daemon/config/README.md b/daemon/config/README.md
index a1e2b04b5..b1e790a21 100644
--- a/daemon/config/README.md
+++ b/daemon/config/README.md
@@ -28,10 +28,11 @@ The configuration file is a `name = value` dictionary. Netdata will not complain
 
 ## Applying changes
 
-After `netdata.conf` has been modified, Netdata needs to be restarted for changes to apply:
+After `netdata.conf` has been modified, Netdata needs to be [restarted](/docs/configure/start-stop-restart.md) for
+changes to apply:
 
 ```bash
-sudo service netdata restart
+sudo systemctl restart netdata
 ```
 
 If the above does not work, try the following:
diff --git a/daemon/main.c b/daemon/main.c
index 7c002ac47..346486a84 100644
--- a/daemon/main.c
+++ b/daemon/main.c
@@ -50,6 +50,7 @@ void netdata_cleanup_and_exit(int ret) {
         rrdeng_exit(&multidb_ctx);
 #endif
     }
+    sql_close_database();
 
     // unlink the pid
     if(pidfile[0]) {
@@ -80,7 +81,7 @@ struct netdata_static_thread static_threads[] = {
     NETDATA_PLUGIN_HOOK_IDLEJITTER
     NETDATA_PLUGIN_HOOK_STATSD
 
-#ifdef ENABLE_ACLK
+#if defined(ENABLE_ACLK) || defined(ACLK_NG)
     NETDATA_ACLK_HOOK
 #endif
 
@@ -1258,6 +1259,10 @@ int main(int argc, char **argv) {
                             print_build_info();
                             return 0;
                         }
+                        else if(strcmp(optarg, "buildinfojson") == 0) {
+                            print_build_info_json();
+                            return 0;
+                        }
                         else {
                             fprintf(stderr, "Unknown -W parameter '%s'\n", optarg);
                             return help(1);
diff --git a/daemon/main.h b/daemon/main.h
index 9d9f4ef0f..4000ab70b 100644
--- a/daemon/main.h
+++ b/daemon/main.h
@@ -19,7 +19,7 @@ struct option_def {
     const char val;
     /** The name of the long option. */
     const char *description;
-    /** Short descripton what the option does */
+    /** Short description what the option does */
     /** Name of the argument displayed in SYNOPSIS */
     const char *arg_name;
     /** Default value if not set */
diff --git a/daemon/unit_test.c b/daemon/unit_test.c
index e6a69e354..9a17aa762 100644
--- a/daemon/unit_test.c
+++ b/daemon/unit_test.c
@@ -371,7 +371,7 @@ int unit_test_str2ld() {
                 return -1;
             }
         }
-        else if(mine != sys && abs(mine-sys) > 0.000001) {
+        else if(mine != sys && ABS(mine-sys) > 0.000001) {
             fprintf(stderr, "Value '%s' is parsed as %" LONG_DOUBLE_MODIFIER ", but system believes it is %" LONG_DOUBLE_MODIFIER ", delta %" LONG_DOUBLE_MODIFIER ".\n", values[i], mine, sys, sys-mine);
             return -1;
         }