Auto kick/ban based on various criteria

[HunterZ]

Might be useful to implement automatic kicking and/or banning based on various criteria in order to help auto-moderate a server.

Criteria ideas:

• username, chat, etc. word/pattern matching
  • regex may be too complex, but some form of pattern matching is needed
  • support external bad words lists?
• ban history
  • may need to query external APIs
  • support thresholds, such as X bans in the last Y days?

Possibly also support a graduated punishment system, such as kick -> timed ban -> permaban?

Needs ability to communicate to the user why they were kicked/banned in case the admin wants to give the user a chance to address it.

May also need some kind of manual exemption feature.