m 0.3.0 Channel is moderated, only "voiced" users can send messages.
M 20 Only registered users (and IRC Ops) can send messages.
n 0.3.0 Channel doesn't allow messages of users not being members.
- N ?? Users can't change their nickname while on this channel.
+ N 23 Users can't change their nickname while on this channel.
O 18 Only IRC operators are allowed to join this channel.
P 0.5.0 Channel is "persistent".
Q 20 Nobody can be kicked from the channel.
~~~~~
(1) This mode is not set by ngIRCd itself but by services. ngIRCd handles
- the mode transparently and possibly adjusts its behaviour.
+ the mode transparently and possibly adjusts its behavior.