fix free()ing of config items

- we need to free the config after it has been succesfully loaded,
  not unconditionally before reloading.
- we also need to free them before exiting from the main program
  to have clean valgrind output.

src/conf.c

@@ -286,7 +286,7 @@ free_added_headers (vector_t add_headers)
         vector_delete (add_headers);
 }
 
-static void free_config (struct config_s *conf)
+void free_config (struct config_s *conf)
 {
         safefree (conf->logf_name);
         safefree (conf->stathost);
@@ -467,8 +467,6 @@ int reload_config_file (const char *config_fname, struct config_s *conf)
 
         log_message (LOG_NOTICE, "Reloading config file");
 
-        free_config (conf);
-
         initialize_config_defaults (conf);
 
         ret = load_config_file (config_fname, conf);

src/conf.h

@@ -116,5 +116,6 @@ struct config_s {
 extern int reload_config_file (const char *config_fname, struct config_s *conf);
 
 int config_compile_regex (void);
+void free_config (struct config_s *conf);
 
 #endif

src/main.c

@@ -264,6 +264,7 @@ int reload_config (int reload_logging)
                 goto done;
         }
 
+        if(config) free_config (config);
         config = c_next;
 
         if (reload_logging) ret = setup_logging ();
@@ -415,6 +416,8 @@ main (int argc, char **argv)
                 filter_destroy ();
 #endif /* FILTER_ENABLE */
 
+        free_config (config);
+
         shutdown_logging ();
 
         return EXIT_SUCCESS;