This commit reverts db7ef3f025
(though it keeps the year updates)
After discussion with several people, it seems better to mention
copyright owners explicitly. eg. https://reuse.software/faq/#vcs-copyright
explains the issue of using VCSs to track copyright.
As db7ef3f025 only replaced mentions
of my name with 'The Limnoria Contributors', this commit only needs
to undo that + add one person who contributed to setup.py.
When the target is a channel it is not in, it would treat it as a user;
which, if userCapabilityRequired is empty, would unconditionally send it
to a channel.
This would usually result in an error, that would be logged,
hence the loop.
