add a pubsub_supported variable in connection

src/common/connection.py

@@ -156,6 +156,7 @@ class Connection(ConnectionHandlers):
 		self.blocked_groups = []
 		self.blocked_all = False
 		self.music_track_info = 0
+		self.pubsub_supported = False
 		self.pep_supported = False
 		self.mood = {}
 		self.tune = {}

src/common/connection_handlers.py

@@ -885,6 +885,8 @@ class ConnectionDisco:
 								gajim.interface.roster.music_track_changed(listener,
 										track, self.name)
 						break
+			if features.__contains__(common.xmpp.NS_PUBSUB):
+				self.pubsub_supported = True
 			if features.__contains__(common.xmpp.NS_BYTESTREAM):
 				our_jid = helpers.parse_jid(gajim.get_jid_from_account(self.name) +\
 					'/' + self.server_resource)