WEBRTC for communication between agents and browsers (#14874)

* initial webrtc setup

* missing files

* rewrite of webrtc integration

* initialization and cleanup of webrtc connections

* make it compile without libdatachannel

* add missing webrtc_initialize() function when webrtc is not enabled

* make c++17 optional

* add build/m4/ax_compiler_vendor.m4

* add ax_cxx_compile_stdcxx.m4

* added new m4 files to makefile.am

* id all webrtc connections

* show warning when webrtc is disabled

* fixed message

* moved all webrtc error checking inside webrtc.cpp

* working webrtc connection establishment and cleanup

* remove obsolete code

* rewrote webrtc code in C to remove dependency for c++17

* fixed left-over reference

* detect binary and text messages

* minor fix

* naming of webrtc threads

* added webrtc configuration

* fix for thread_get_name_np()

* smaller web_client memory footprint

* universal web clients cache

* free web clients every 100 uses

* webrtc is now enabled by default only when compiled with internal checks

* webrtc responses to /api/ requests, including LZ4 compression

* fix for binary and text messages

* web_client_cache is now global

* unification of the internal web server API, for web requests, aclk request, webrtc requests

* more cleanup and unification of web client timings

* fixed compiler warnings

* update sent and received bytes

* eliminated of almost all big buffers in web client

* registry now uses the new json generation

* cookies are now an array; fixed redirects

* fix redirects, again

* write cookies directly to the header buffer, eliminating the need for cookie structures in web client

* reset the has_cookies flag

* gathered all web client cleanup to one function

* fixes redirects

* added summary.globals in /api/v2/data response

* ars to arc in /api/v2/data

* properly handle host impersonation

* set the context of mem.numa_nodes

3 files changed, 7 insertions, 7 deletions

diff --git a/collectors/cgroups.plugin/sys_fs_cgroup.c b/collectors/cgroups.plugin/sys_fs_cgroup.c
index 4bb88c374f..dd8711262d 100644
--- a/collectors/cgroups.plugin/sys_fs_cgroup.c
+++ b/collectors/cgroups.plugin/sys_fs_cgroup.c
@@ -1771,11 +1771,11 @@ static inline void substitute_dots_in_id(char *s) {
 
 char *cgroup_parse_resolved_name_and_labels(DICTIONARY *labels, char *data) {
     // the first word, up to the first space is the name
-    char *name = mystrsep(&data, " ");
+    char *name = strsep_skip_consecutive_separators(&data, " ");
 
     // the rest are key=value pairs separated by comma
     while(data) {
-        char *pair = mystrsep(&data, ",");
+        char *pair = strsep_skip_consecutive_separators(&data, ",");
         rrdlabels_add_pair(labels, pair, RRDLABEL_SRC_AUTO| RRDLABEL_SRC_K8S);
     }
 
diff --git a/collectors/proc.plugin/sys_devices_system_node.c b/collectors/proc.plugin/sys_devices_system_node.c
index 068d739db4..d6db94a275 100644
--- a/collectors/proc.plugin/sys_devices_system_node.c
+++ b/collectors/proc.plugin/sys_devices_system_node.c
@@ -105,7 +105,7 @@ int do_proc_sys_devices_system_node(int update_every, usec_t dt) {
                             , m->name
                             , NULL
                             , "numa"
-                            , NULL
+                            , "mem.numa_nodes"
                             , "NUMA events"
                             , "events/s"
                             , PLUGIN_PROC_NAME
diff --git a/collectors/proc.plugin/sys_fs_btrfs.c b/collectors/proc.plugin/sys_fs_btrfs.c
index a697d5614c..da89411bd7 100644
--- a/collectors/proc.plugin/sys_fs_btrfs.c
+++ b/collectors/proc.plugin/sys_fs_btrfs.c
@@ -135,9 +135,9 @@ static inline int collect_btrfs_error_stats(BTRFS_DEVICE *device){
     
     char *p = buffer;
     while(p){
-        char *val = mystrsep(&p, "\n");
+        char *val = strsep_skip_consecutive_separators(&p, "\n");
         if(unlikely(!val || !*val)) break;
-        char *key = mystrsep(&val, " ");
+        char *key = strsep_skip_consecutive_separators(&val, " ");
 
         if(!strcmp(key, "write_errs")) device->write_errs = str2ull(val, NULL);
         else if(!strcmp(key, "read_errs")) device->read_errs = str2ull(val, NULL);
@@ -166,9 +166,9 @@ static inline int collect_btrfs_commits_stats(BTRFS_NODE *node, int update_every
     
     char *p = buffer;
     while(p){
-        char *val = mystrsep(&p, "\n");
+        char *val = strsep_skip_consecutive_separators(&p, "\n");
         if(unlikely(!val || !*val)) break;
-        char *key = mystrsep(&val, " ");
+        char *key = strsep_skip_consecutive_separators(&val, " ");
 
         if(!strcmp(key, "commits")){
             long long commits_total_new = str2ull(val, NULL);