introduce owner concept in send_queue

In order to be able to distinguish between user-created entries and
library-internal entries, we mark each entry who it belongs to.
This allows then later to let the user manage only the queue entries
that were created by them.

Signed-off-by: Steffen Jaeckel <jaeckel-floss@eyet-services.de>

src/event.c

@@ -142,6 +142,8 @@ void xmpp_run_once(xmpp_ctx_t *ctx, unsigned long timeout)
             tsq = sq;
             sq = sq->next;
             conn->send_queue_len--;
+            if (tsq->owner & XMPP_QUEUE_USER)
+                conn->send_queue_user_len--;
             strophe_free(ctx, tsq);
 
             /* pop the top item */