From http://www.jwz.org/xscreensaver/xscreensaver-5.40.tar.gz
[xscreensaver] / hacks / glx / xscreensaver-gl-helper.man
2014-05-30 Zygo BlaxellFrom jwz.org/xscreensaver/xscreensaver-5.25.tar.gz
2013-12-09 Zygo BlaxellFrom jwz.org/xscreensaver/xscreensaver-5.24.tar.gz
2009-03-02 Zygo Blaxellftp.x.org/contrib/applications/xscreensaver-3.26.tar.gz