community management

[jjj333-p]

• - mod room
• - state keys in mod room to identify child rooms
• - child rooms have shared secret in state to confirm, not room id for protection
• - bans from mod room dont identify the mod (maybe send event id, which will be hard to find outside and protect identity but be traceable)
• - protection against state diverge?
• - automated protection
• - banlist short coding