+c - No color. All color codes in messages are stripped.
+g - Free invite. Everyone may invite users. Significantly
weakens +i control.
- +z - Op moderated. Messages blocked by +m are instead sent to ops.
+ +z - Op moderated. Messages blocked by +m, +b and +q are instead
+ sent to ops.
+L - Large ban list. Increase maximum number of +beIq entries.
Only settable by opers.
+P - Permanent. Channel does not disappear when empty. Only
ops are necessary).
+Q - Disable forward. Users cannot be forwarded to the channel
(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.
WITH PARAMETERS:
+f - Forward. Forwards users who cannot join because of +i,