task: add simple comment about functionality
@@ -148,6 +148,8 @@ int flb_task_retry_clean(struct flb_task *task, void *data)
out_th = (struct flb_output_thread *) FLB_THREAD_DATA(data);
o_ins = out_th->o_ins;
+
+ /* Delete 'retries' only associated with the output instance */
mk_list_foreach_safe(head, tmp, &task->retries) {
retry = mk_list_entry(head, struct flb_task_retry, _head);
if (retry->o_ins == o_ins) {
