mark end-of-stream as session-ending event

slixmpp/xmlstream/xmlstream.py

@@ -406,6 +406,7 @@ class XMLStream(asyncio.BaseProtocol):
                     if self.xml_depth == 0:
                         # The stream's root element has closed,
                         # terminating the stream.
+                        self.end_session_on_disconnect = True
                         log.debug("End of stream received")
                         self.disconnect_reason = "End of stream"
                         self.abort()