Let ghostscript-encrypt grab its directory directly from aladdin or gnu
ghostscript.
Includes a perfectly sick hack to obtain PDFDIR from those directories:
we do need PORTSDIR at Makefile parsing time, and for that, we just hack
its value from the current Makefile, avoiding endless recursion with
a flag.
Note that this hack is clean though, and doesn't need extra knowledge from
the rest of the ports tree.
Important changes:
- prodded by Nikolay Sturm to do the upgrade,
- Gnu-ghostscript is now 5.50, packaging changed slightly,
- most patches have been integrated,
- use MAKE_FLAGS to remove Makefile patches and gnu-make dependency,
- pull pdf_encrypt out from the main package so that gs can be distributed
on CD-Rom,
- simplify DEVICE_DEVS (get list from NetBSD), removed interactive script
for now, as it wasn't reliably upgraded,
- infrastructure allows for Aladdin ghostscript along-side.
