Removal of max_nick_length is now possible #106
Description
Changing some things in the code base, can make use of go-ircevent's ISUPPORT parsing to pull out the NICKLEN ISUPPORT param and use that instead of having a configuration setting.
Key question here is... are there any IRC servers that don't report this ISUPPORT param.
The other question is should this be left in for vanity reasons such as "I don't like long nicks so I'm going to force discord puppets to have ones as short as possible!".