this update removes some heavy optional RUN_DEPENDS to slim
down it, since it does not affect the plan9port usability itself
if someone wants to read a .ps file for example or whatever,
just install the package like `pkg_add ghostscript' then hook up a
plumber(1) pattern accordingly. it removes also the following
extra files what are not part of plan9port:
pgw.tar.bz2, roget.tar.bz2, scat.tgz
while here:
- get rid of MAP_STACK patch has been merged upstream;
- remove no longer required patches
- tidy up Makefile
thanks abieber@ for giving some tests on previous diff I sent
on ports@
28c8436bc2