tools (common/uri): minor comment update

src/tools/common/uri.py

@@ -43,6 +43,8 @@ def parseXMPPUri(uri):
     if uri_split.scheme != 'xmpp':
         raise ValueError(u'this is not a XMPP URI')
 
+    # XXX: we don't use jid.JID for path as it can be used both in backend and frontend
+    # which may use different JID classes
     data = {u'path': urllib.unquote(uri_split.path).decode('utf-8')}
 
     query_end = uri_split.query.find(';')