pfSense

We have code that cleans up and eliminates duplicate settings in loader.conf and loader.conf.local to avoid foot-shooting and to make sure that hardware works properly.

The code that checks/matches these values is a bit too aggressive and over-matches, and removes some values from loader.conf.local that it makes sense to allow a user to override.

The matching could be improved, and it could handle the local case slightly differently so that some values can be overridden by users.