add meld diff tool

Obtained from:	FreeBSD ports


git-svn-id: http://svn.midnightbsd.org/svn/mports@15867 c872e0db-cc11-e311-ab8b-002590791c19
start work on importing FreeBSD license framework with our own mport license system. They have a few features that we do not from the experience of planning after we and openbsd did this.


git-svn-id: http://svn.midnightbsd.org/svn/mports@15868 c872e0db-cc11-e311-ab8b-002590791c19
move license-list target to external file.


git-svn-id: http://svn.midnightbsd.org/svn/mports@15869 c872e0db-cc11-e311-ab8b-002590791c19
missing lgpl, opera groups


git-svn-id: http://svn.midnightbsd.org/svn/mports@15870 c872e0db-cc11-e311-ab8b-002590791c19