C 19 Only users that share a channel are allowed to send messages.
F 22 Relaxed flood protection (only settable by IRC Operators).
i 0.0.1 User is "invisible".
- I 23 No channels are shown on WHOIS (IRC Operators can always see those).
+ I 23 No channels are shown on WHOIS (IRC Ops can always see those).
o 0.0.1 User is IRC operator.
q 20 User is protected, can not be kicked from a channel.
r 0.0.1 User is restricted.