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.

See #1426

Allow custom limit definitions that encompass multiple subnets

Fixes #1407

Support PROXY protocol v2, including ahead of plaintext connections

See #1171.

See #1309

See discussion on #68.

See #1240

These should have been removed in #1027.

This ensures that host:port is used rather than an empty address,
which defaults to 127.0.0.1:3306 (ignoring the host in the config).

This adds a new configuration option, socket-path, instead of using
host.