Prevent spoilers from being used in lobby
Suppress a bug with IP not showing up
For some reason, IP doesn't show up when mods use /whois on themselves.

I honestly don't understand the current permission system all that well,
so I'm just going to suppress the bug like this for now.
NU is having a suspect test
Don't show roompromote message if no change happened
Because there's no auth necessary to change a user from deauthed to
deauthed, regular users could make the message appear.
Admin and Leader are now global-only
It is no longer possible to promote someone to Room Admin or Room
Leader.