git: mk.conf - back out part of the previous commit

[Matthew Dillon]

    I think root/etc/mk.conf in nrelease is old cruft not used by pkgsrc
    anymore, but I'm not 100% sure w/ regards to non-pkgsrc stuff.

    pkgsrc uses /usr/pkg/etc/mk.conf and the nrelease builds them
    explicitly in the Makefile (e.g. around line 379 of
    /usr/src/nrelease/Makefile).

    Here's my take on the licensing issue.  We want minimal licenses
    for the official ISO and IMG, but we can allow any licenses for the
    official GUI build so long as they allow the stuff to be pre-installed.
    If need-be we can put a notice on the wiki/web-page with regards to
    licenses used in the GUI build.  IMHO people who want the GUI stuff
    will already be mostly aware of the licensing involved.

						-Matt