make it clearer when rehash has completed

two cleanups

This avoids conditions where two sessions can be attached to the same client
while not logged into an account.

include account-notify in the response batch

fix plan9 support

fix #1020

fix #1021

fix #1019

Add support for Unix domain sockets.

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.

Revert "Add support for Unix domain sockets"

#1011: recommend allowing webirc from localhost

Add support for Unix domain sockets

make histserv replies come from histserv, not hostserv

fix #1005

fix #858 and #383

fix #1003

upgrade go-ident to fix parsing issue

ratify SETNAME

fix #996

treat channel founder as such even if they don't have +q

Call ApplyUserModeChanges for default user modes.

This ensures that counts like the number of invisible users are updated
correctly.