Add support for utf8-only
Add support for account-tag
Slightly relax new log file permissions

Make new log files group-readable by default. To retain the prior
behavior, soju can be started with a umask set to 0077.
contrib/clients: add reference to Weechat script
doc/soju.1: explain http-origin defaults
Don't suggest users to /motd in multi-upstream mode
Make user MODE commands fail in multi-upstream mode

References: https://todo.sr.ht/~emersion/soju/20
Forward user mode changes in single-upstream mode

References: https://todo.sr.ht/~emersion/soju/20
Forward MOTD messages downstream

The first MOTD upon connection is ignored, but subsequent MOTD messages
(requested by the "MOTD" message from the client, typically using a
/motd command) are forwarded.
Add downstreamConn.SendBatch helper
Prune detached channels from CHATHISTORY TARGETS

References: https://github.com/ircv3/ircv3-specifications/pull/450
doc/ext/bouncer-networks: fix typo
Forward unknown commands to upstream in single-upstream mode
Send placeholder when no network/channel is returned by BouncerServ
Reject JOIN with invalid channel names

This prevents us from storing typo'ed channel names in the DB.
Fix typo in BOUNCER notifications: s/status/state/
Broadcast BOUNCER notifications to all downstream connections

We weren't sending them to downstreams which weren't bound to a
Allow networks to be disabled
doc/getting-started: s/Freenode/Libera Chat/