move "SENT: ..." debug statement to the place where it belongs

This also adds a "QUEUED: ..." debug statement at verbosity level 2.

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

src/event.c

@@ -134,6 +134,7 @@ void xmpp_run_once(xmpp_ctx_t *ctx, unsigned long timeout)
                 break; /* partial write or an error */
 
             /* all data for this queue item written, delete and move on */
+            xmpp_debug(conn->ctx, "conn", "SENT: %s", sq->data);
             xmpp_debug_verbose(1, ctx, "xmpp",
                                "Finished writing queue element: %p.", sq);
             xmpp_free(ctx, sq->data);