Added some exceptions for ban commands.
Added some exceptions for ban commands.

This does avoid that on multiply bots in a channel a player could be
banned multiply times. Also disabled autohost.

m-unkel/OHSystem,m-unkel/OHSystem,m-unkel/OHSystem,m-unkel/OHSystem,m-unkel/OHSystem,m-unkel/OHSystem,m-unkel/OHSystem,m-unkel/OHSystem