The tree contained many operating system specific Makefiles which were
being included in other Makefiles. This commit removes those and adds
the code to the makefiles which included them using make's conditional
processing.
X-Gentoo-Bug: 387441
X-Gentoo-Bug-URL: http://bugs.gentoo.org/show_bug.cgi?id=387441
Lowercase all configurable variables, non configurations remain uppercase.
Replace rc_env_bool with rc_yesno.
Split localmount info procfs (Linux) and dumpon, savecore (BSD)