util.prosodyctl.check: Normalize potential to form without trailing '.'
In some cases you might end up with both 'xmpp.example.com' and
'xmpp.example.com.', which are the same thing so no point in doing the
same checks twice.
Welcome hackers!
This project accepts and *encourages* contributions. If you would like to get
involved you can join us on our mailing list and discussion rooms. More
information on these at https://prosody.im/discuss
Patches are welcome, though before sending we would appreciate if you read
docs/coding_style.md for guidelines on how to format your code, and other tips.
Documentation for developers can be found at https://prosody.im/doc/developers
Have fun :)