add a hook for the unqueuemanager

EVENTS.txt

@@ -261,3 +261,7 @@ StartEnqueueNotice: about to add a notice to the queues (good place to add a new
 EndEnqueueNotice: after adding a notice to the queues
 - $notice: the notice being added
 - $transports: modifiable list of transports to use
+
+UnqueueHandleNotice: Handle a notice when no queue manager is available
+- $notice: the notice to handle
+- $queue: the "queue" that is being executed

lib/unqueuemanager.php

@@ -73,7 +73,9 @@ class UnQueueManager
             jabber_broadcast_notice($notice);
             break;
          default:
-            throw ServerException("UnQueueManager: Unknown queue: $type");
+            if (Event::handle('UnqueueHandleNotice', array(&$notice, $queue))) {
+                throw ServerException("UnQueueManager: Unknown queue: $queue");
+            }
         }
     }