that we have an appropriate rxvt.
. Make rxvt a PATCH_DEPENDS as it is tested in pre-configure (there is no
CONFIGURE_DEPENDS).
. Fix packing list and unbreak.
. Fix some minor whitespace bogons in Makefile.
. Add patches which hopefully fix the build on 5.x.
. Add a patch to stop the port installing stuff outside of ${PREFIX}.
Some of this could be added back in with a better patch that installed
it in the right place.
