Mention a couple of bugs to fix at some point.

src/xmpp/client.go

@@ -276,3 +276,6 @@ type saslFailure struct {
 	XMLName xml.Name `xml:"urn:ietf:params:xml:ns:xmpp-sasl failure"`
 	Reason xml.Name `xml:",any"`
 }
+
+// BUG(matt): authentication incorrectly reports, "No supported SASL mechanism
+// found", for authentication attemtps that fail due to invalid credentials.

src/xmpp/xmpp.go

@@ -204,3 +204,5 @@ func (x *XMPP) receiver() {
 		}
 	}
 }
+
+// BUG(matt): Filter channels are not closed when the stream is closed.