Ghostscript/GhostPDL 9.28 Release Candidate 1

I have created archives (and Ghostscript Windows installers) for the
first public release candidates for Ghostscript and GhostPDL 9.28, and
they are available here:

https://github.com/ArtifexSoftware/ghostpdl-downloads/releases/tag/gs928rc1


There are some very important changes in this release:

First: we have ground-up rewritten the file access controls that were
the major benefit of the "SAFER" code.

Second: as we've promised (threatened?) for years, SAFER is now enabled
by default (it can still be disabled with "-dNOSAFER").

Third: those of you still paying attention will probably have worked out
that the implication of the above two points is that some very new code
is being enabled by default!

As a consequence, we want to give users an extended chance to find what
we did wrong.

Note that the previous SAFER behaviour can still be accessed by using
"-dSAFER -dOLDSAFER" - but this will only be true until we're convinced
we've got no reason to keep the old behaviour.


Although we're starting this release candidate process early, we're
still targetting the 9.28 release on the "normal" schedule (late
September/early Oct), in order to give as much testing time as possible
for the new code.


Please give the release candidate a try on your system if you're
interested in helping test the release-in-progress. Your feedback is
always appreciated, but especially so with this release.


All the best,

Chris