xscreensaver 6.13, with changes broken down

[hseg]

Went through the changes and tried to split them into logical commits for a clearer overview. Mostly succeeded, but there's two commits which I don't quite understand, marked them as such by prefixing the commit title with ?.

This revealed the upstream changelog omits/skips on detail on the following changes:

• Makefile: install_prefix has been renamed to DESTDIR
• The following configure options are deprecated: --with-gles, --with-glx, --without-setuid-hacks
• make install-pam now patches the packaged xscreensaver.pam using files in the build machine's PAM configuration

Some of the more notable commits:

• make: rename install_prefix -> DESTDIR

• make: delete old PREFERRED_DEMO in all cases

  Although, this should just be done by pulling the rm out of the conditional

• make: warn/error on deprecated/disliked configs

  • Error:

    • --with-gles
    • --with-glx breaks GLSL

  • Warn:

    • --without-setuid-hacks breaks hacks/sonar (jwz: for no good reason)

• make: Fix PAM patching logic
  Pick up patches from build system's PAM_DIR, instead of package chroot's PAM_DIR (which will generally be empty)

  Of course, advisedness of such build system dependence is left as an exercise to the reader

• app-defaults: use xdg commands (more generic)

• Add unitary debian package

  jwz dislikes debian fragmenting the package

• hacks/xscreensaver-getimage: store url/title in xattrs

  xattr support detection added to Makefile

• ? Fix Wayland support

  Ran out of time trying to figure this one out, pushed all Wayland-touching code into this commit

• utils: Extract double_time, easing to libs

• xscreensaver: fix block until input logic

  Looks like a typo inverted the tv.tv_usec == 0 test? Don't know this code

• ? hacks/glx/endgame: make animations fancier, add more famous endgames

  At least, I think this is what this rewrite is trying to accomplish?

• hacks/bsod: simplify logic

• hacks/glx/glslideshow: Rewrite

  Probably this is one of the

  Some hacks were calling glXSwapBuffers before the first call to glXMakeCurrent; allow it.

  cases mentioned in the upstream changelog, but couldn't quite figure it out.

  Removes the credit for the 2003 rewrite from Mike Oliphant for no clear reason.

• hacks/glx/texfont: Fix on iOS
  iOS lacks support for some OpenGL APIs, skip them

• trans: Add Georgian translation

[hseg]

After opening this, I see you've already committed the 6.13 lumped edit, am still leaving this PR here in case it's useful for folks.

[Zygo]

It would be an interesting project idea to go through the xscreensaver history and retroactively break down releases into logical change sets. I'd follow and possibly mirror that work if someone else is willing to do it. On the other hand, anyone can open a github repo, so I'm not sure what value I can add to that.

[hseg]

On the other hand, anyone can open a github repo, so I'm not sure what value I can add to that.

Fair enough - I picked this repo as a way to centralize the knowledge, but I did not mean to take on the responsibility for the historical work upon myself.