Revert: Settings name change

Return to original settings name.
Sort plugins by priority+name

Sorting was disabled in ac8c39987db1e357379b5afa66a7e73cd7ef4fae
and is re-enabled now.
Lazy initialization

Don't scan plugins directory until they are used.
Some plugins that use URLResolver are aware of speed issues (e.g 1channel),
but some others aren't (e.g allInOne), this change removes the responsability
of deciding when to initialize the resolver plugins from the final developer.