nightly-0d9c184f-ls147

LinuxServer Changes:

Rebase to Alpine 3.20.

thelounge Changes:

server: fix time handling

The framework may emit messages which do not have a time stamp.
We tried to unconditionally convert the time field, fix that.

The Msg constructor replaces falsey time fields with the current
date so we can also remove the duplication from that codepath.