Import WHOX spec

[jwheare]

Note that some implementations in the wild have vendor specific variations. E.g. rules on case sensitivity, the H (real host names) option, join-delayed channel members.

It would be useful to document the base compatibility case for new implementations and highlight any areas where vendor-extensions are possible.

https://github.com/quakenet/snircd/blob/master/doc/readme.who
http://faerion.sourceforge.net/doc/irc/whox.var

[slingamn]

@ilbelkyr expressed interest in this 🥇

[SadieCat]

It might be a neat WHOX extension to add a value to the ISUPPORT token like WHOX=[flags],[fields] so that if server vendor has custom fields/flags they can let clients know about them

We do something similar to this with ESILENCE in InspIRCd for our SILENCE flags.

(cc @ilbelkyr)

[emersion]

I'm in the process of documenting WHO on modern.ircdocs.horse (ircdocs/modern-irc#138), and I'm wondering: would WHOX make more sense as a modern.ircdocs.horse patch or as an IRCv3 ext? cc @progval

[jwheare]

I think it'd help to have it in IRCv3 given its long standing non-standardisation. But no reason it can't be on modern too.

[emersion]

Opened #482