forbidding special control chars in idents

[Thomas Kuiper <engerim@xxxxxxxxxxxxx>]

Hi there,

when checking some stuff what is possible with nicks/idents
I noticed that you can easily have these mirc-color codes
or bold in your nickname.

What about not allowing these control at all?
(same rule like with nicknames).

I noticed some klines on servers like K:*:<NULL>:*^b*:0:0
I know the rfc 1413 says this is legal, but it sucks if you have a
color nick ident flooder on your channel.

Greets,
Engerim