update a few ports


git-svn-id: http://svn.midnightbsd.org/svn/mports@15858 c872e0db-cc11-e311-ab8b-002590791c19
add dirdiff, gui diff utility


git-svn-id: http://svn.midnightbsd.org/svn/mports@15859 c872e0db-cc11-e311-ab8b-002590791c19