complete the Exception's list when catching JID error:

- Twisted JID constructor raises not only jid.InvalidFormat but also RuntimeError and AttributeError

src/plugins/plugin_misc_text_commands.py

@@ -296,7 +296,7 @@ class TextCommands(object):
                 target_jid = jid.JID(entity)
                 if not target_jid.user or not target_jid.host:
                     raise jid.InvalidFormat
-            except (jid.InvalidFormat, RuntimeError):
+            except (RuntimeError, jid.InvalidFormat, AttributeError):
                 self.feedBack(_("Invalid jid, can't whois"), mess_data, profile)
                 return False