Log Message:
sawfish: re-source 1.13 archive for true release content

Not sure how I missed it, but the original archive site is still the
place to get the true release archives, as I just noticed while
comparing something. This simplifies things, as they actually do
provide a configure script, have a normal $WRKSRC by default, etc., in
that version of the archive. This change is close enough after the
original update I made to hopefully be unobtrusive, and the archive
file name differs, too.

There's an issue where upstream thinks they have an install target that
accommodates bsdtar, but it doesn't work on NetBSD (at least, 9.99.95).
Patching it could be revisited, but, since this package seems to expect
gtar as a runtime dependency, anyway, hardly pressing.