res_sorcery_memory_cache: Implement expire_on_reload option.

This change implements the expire_on_reload option for memory caches.
If enabled and a reload is performed all objects within the cache
will be expired and the cache emptied.

ASTERISK-25067
Reported by: Matt Jordan

Change-Id: Id46aa1957d660556700e689e195eed57c989b85e

res/res_sorcery_memory_cache.c

@@ -888,6 +888,15 @@ static void sorcery_memory_cache_load(void *data, const struct ast_sorcery *sorc
  */
 static void sorcery_memory_cache_reload(void *data, const struct ast_sorcery *sorcery, const char *type)
 {
+	struct sorcery_memory_cache *cache = data;
+
+	if (!cache->expire_on_reload) {
+		return;
+	}
+
+	ao2_wrlock(cache->objects);
+	remove_all_from_cache(cache);
+	ao2_unlock(cache->objects);
 }
 
 /*!