ignore transports with wrong jid. fixes #2574

src/common/connection_handlers.py

@@ -690,6 +690,13 @@ class ConnectionDisco:
 			attr = {}
 			for key in i.getAttrs():
 				attr[key] = i.getAttrs()[key]
+			if 'jid' not in attr:
+				continue
+			try:
+				helpers.parse_jid(attr['jid'])
+			except:
+				# jid is not conform
+				continue
 			items.append(attr)
 		jid = helpers.get_full_jid_from_iq(iq_obj)
 		hostname = gajim.config.get_per('accounts', self.name, 

src/common/xmpp_stringprep.py

@@ -185,8 +185,7 @@ class NamePrep:
 	prohibiteds = [unichr(n) for n in range(0x00, 0x2c + 1) +
 									   range(0x2e, 0x2f + 1) +
 									   range(0x3a, 0x40 + 1) +
-									   range(0x5b, 0x5e + 1) +
-									   range(0x60, 0x60 + 1) +
+									   range(0x5b, 0x60 + 1) +
 									   range(0x7b, 0x7f + 1) ]
 
 	def prepare(self, string):