fire 'disconnected' callback from abort()

slixmpp/xmlstream/xmlstream.py

@@ -516,6 +516,7 @@ class XMLStream(asyncio.BaseProtocol):
             self.event("killed")
             self.disconnected.set_result(True)
             self.disconnected = asyncio.Future()
+            self.event("disconnected", self.disconnect_reason)
 
     def reconnect(self, wait=2.0, reason="Reconnecting"):
         """Calls disconnect(), and once we are disconnected (after the timeout, or