Remove $FreeBSD$: one-line sh pattern

Remove /^\s*#[#!]?\s*\$FreeBSD\$.*$\n/

These two directories build man pages, so it's incorrect to tag them
NO_OBJ. Also, make sure the loader.conf.5 man gets built and installed.

Go back to one loader.conf

We really only need one loader.conf. The other loader.conf was created
because the current one took forever to parse in FORTH. That will be
fixed in the next commit.