FS-11708 Fix deadlock on 'avmd uuid stop'

src/mod/applications/mod_avmd/mod_avmd.c

@@ -1151,7 +1151,7 @@ SWITCH_MODULE_LOAD_FUNCTION(mod_avmd_load) {
         switch_log_printf(SWITCH_CHANNEL_LOG, SWITCH_LOG_ERROR, "No memory pool assigned!\n");
         return SWITCH_STATUS_TERM;
     }
-    switch_mutex_init(&avmd_globals.mutex, SWITCH_MUTEX_DEFAULT, pool);
+    switch_mutex_init(&avmd_globals.mutex, SWITCH_MUTEX_NESTED, pool);
     avmd_globals.pool = pool;
 
     if (avmd_load_xml_configuration(NULL) != SWITCH_STATUS_SUCCESS) {