fix memory leaks and mismatches of the use of the z functions for allocations (#12841)

* fix mismatches of the use of the z functions for allocations

* when there was no memory; the original name of the dimensions was freed, and with mismatching deallocator..

* fixed memory leak at rrdeng_load_metric_*() functions

* fixed memory leak on exit of plugins.d parser

* fixed memory leak on plugins and streaming receiver threads exit

* fixed compiler warnings

1 files changed, 1 insertions, 1 deletions

diff --git a/daemon/main.c b/daemon/main.c
index 4b90dd74d6..74684b7312 100644
--- a/daemon/main.c
+++ b/daemon/main.c
@@ -1235,7 +1235,7 @@ int main(int argc, char **argv) {
     // initialize rrd, registry, health, rrdpush, etc.
 
     netdata_anonymous_statistics_enabled=-1;
-    struct rrdhost_system_info *system_info = calloc(1, sizeof(struct rrdhost_system_info));
+    struct rrdhost_system_info *system_info = callocz(1, sizeof(struct rrdhost_system_info));
     get_system_info(system_info);
     system_info->hops = 0;
     get_install_type(&system_info->install_type, &system_info->prebuilt_arch, &system_info->prebuilt_dist);