Add command to mass ban/kick raiding users

[Emimendoza]

If a large influx of users is detected there should be an option to mass ban or kick the users. This would be a useful feature as I'm sure most of y'all know first hand.

[jkriste]

This would probably be a very complex feature. If you have ideas on the UX/implementation of it, feel free to post more info.

[Emimendoza]

Like an automatic raid detection. If there is a rapid-fire influx of users (set by the server admin) the server can automatically be put in read-only (opt-in) and the server admins can run a command to purge all the incoming users