I think that 'moderator vs admin' is a pretty common set of priv levels,
whereas 'oper vs admin' is a little confusing, esp. to less irc-savvy
people.
/SAJOIN and /SAMODE are really common for joining channels to check out
what's going on and for e.g. opping someone when nobody in the channel
is opered, so it makes sense for mods to have those. I feel similarly
about vhosts, they're usually something that's delegated to less-prived
opers.
Changed the whois line from 'a server admin' to 'the server admin' to
make it a bit more clear that this is one single user, rather than a set
of privs to be shared. And it's a tiny thing, but removed the 'less
privileged' term from alice's oper block because it felt a bit dodgy.
