(however, new forwards can still be set subject to +F).
+C - Disable CTCP. All CTCP messages to the channel, except ACTION,
are disallowed.
+ +D - Disable CTCP ACTION. All CTCP ACTIONs to the channel will
+ be blocked.
+ +T - Disable notice. All notices to the channel are disallowed.
+ +E - No kicks. Chanops will not be able to use /kick on this
+ channel.
+ +N - No nickchanges. People on the channel will not be able to
+ change nick.
+ +G - Block messages in all caps. Messages that are more than
+ 50% capital letters will be blocked.
+ +J - Prevent autorejoin on kick. Users will not be able to
+ rejoin immediately after being kicked.
WITH PARAMETERS:
+f - Forward. Forwards users who cannot join because of +i,