core (memory/disco): getInfos now handle node + use client instead of profile in many methods

src/plugins/plugin_xep_0280.py

@@ -99,7 +99,7 @@ class XEP_0280(object):
             log.info(_(u"Not activating message carbons as requested in params"))
             return
         try:
-            yield self.host.checkFeatures((NS_CARBONS,), profile=client.profile)
+            yield self.host.checkFeatures(client, (NS_CARBONS,))
         except exceptions.FeatureNotFound:
             log.warning(_(u"server doesn't handle message carbons"))
         else: