The 'forward' option of app.moderator.handle_message() is never used
The mailman.app.moderator.handle_message()
function has a forward
option which accepts a list of email addresses to forward the handled message to. However, this option is never used in the code. It's only tested once in a unit test. It could be used from the REST interface but the validator prevents from using it.
We should either allow it from the REST interface by changing the validator in mailman.rest.post_moderation.HeldMessage.post()
or remove this function argument and the associated codepath entirely.