+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.
WITH PARAMETERS:
+f - Forward. Forwards users who cannot join because of +i,
PARAMS: /mode #channel +v nick
+o - Op. Allows a user full control over the channel.
PARAMS: /mode #channel +o nick
- +b - Ban. Prevents a user from entering the channel, based on a
+ +b - Ban. Prevents a user from entering the channel, and from
+ sending or changing nick if they are on it, based on a
nick!ident@host match.
PARAMS: /mode #channel +b nick!user@host
- +q - Quiet. Prevents a user from sending to the channel, based on a
- nick!ident@host match.
+ +q - Quiet. Prevents a user from sending to the channel or changing
+ nick, based on a nick!ident@host match.
PARAMS: /mode #channel +q nick!user@host
+e - Exempt. Allows a user to join a channel and send to it even if
they are banned (+b) or quieted (+q), based on a nick!ident@host