AutoMode: use default settings that make sense.

AutoMode is enabled by default, so banning works.

AutoMode doesn't AutoMode owner, because in Limnoria it's not required if owner has the op/whatever capability.

AlternativeCapabilities weren't enabled before by default and they aren't so used anyway.

Fallthrough yes, it makes sense to me. If you enable automoding voiced people, it makes sense that people with higher capability are also voiced.

Op, HalfOp, voice: don't use them as default. It just confuses people like we noticed elsewhere.

Ban: yes, because channel ban.add depends on this to do anything. 

EDIT: Added description about choices that I made.