README documents removed ssh irc@ route

[JoesnageL]

The README still documents an in-BBS IRC client route:

ssh -t irc@bbs.profullstack.com

and says ssh irc@ uses internal/irc. That no longer matches the repo:

• docs/irc.md explicitly says there is no in-BBS ssh irc@ route.
• internal/auth/auth.go reserves irc because members should connect with an external IRC client.
• There is no internal/irc package in the tree.

This can mislead new users into trying an SSH route that is not wired. The README should match the documented native TLS/WebSocket IRC flow.

[threebeats]

Fixed in PR #39. Great to see uGig bounties supporting this kind of documentation cleanup work.