ircv3

Reported by @emersion. Compare c95ed4694.

Currently:

WHO NickServ
@time=2021-11-30T17:02:12.158Z :irc.ergo.chat 315 root nickserv!*@* :End of WHO list

This should instead return a normal WHO line describing NickServ.

Expected behaviour: iban reports cowardly refusing to ban self as channel iban doesn't involve kick.

<~Mikaela> R-66Y, kban R-66Y 
<%R-66Y> Error: I cowardly refuse to kickban myself.
<~Mikaela> R-66Y, iban R-66Y 
<%R-66Y> Error: I cowardly refuse to kickban myself.

The current (running) version of this Limnoria is 2022.04.27, running on Python 3.9.2 (default, Feb 28 2021, 1

I'm having a very hard time (as a Rust beginner) figuring out how to hack in an SASL connection with url-bot-rs, and I haven't found a dependent crate that actually uses SASL, to use as an example.

WeeChat lets you specify the SASL mechanism. A similar config option could be used here to state whether to not us

This is a limitation because $x: and $~x: are already allowed.

It should be a simple matter of re-using this code in lib/irc/handler.ex: https://github.com/progval/matrix2051/blob/e1b664a4389755bd347d131451b9820c9bdf505a/lib/matrix_client/poller.ex#L1083-L1106

Suggested by @Thaodan in progval/matrix2051#14 (comment)