Description of feature: mod_watchregistrations should (configurably) not only notify admins about new accounts created, but also of those deleted Motivation: (Why?) On of the intentions of the registration notifications is to keep an eye on spammers. With multiple admins, it's useful to have not only the log of accounts (possibly) to delete, but also the information which of these have already been handled.

This should be as simple as adding the hook function from <https://hg.prosody.im/0.10/file/tip/plugins/mod_watchregistrations.lua#l19> also to hook("user-deregistered")

This could easily be done in a separate plugin.