From http://www.jwz.org/xscreensaver/xscreensaver-5.29.tar.gz
[xscreensaver] / README.hacking
2013-02-08 Zygo Blaxellwww.jwz.org/xscreensaver/xscreensaver-5.13.tar.gz
2013-02-08 Zygo Blaxellwww.jwz.org/xscreensaver/xscreensaver-5.10.tar.gz
2013-02-08 Zygo Blaxellwww.jwz.org/xscreensaver/xscreensaver-5.07.tar.gz
2013-02-08 Zygo Blaxelltienza.es/crux/src/www.jwz.org/xscreensaver/xscreensave...
2013-02-08 Zygo Blaxelltienza.es/crux/src/www.jwz.org/xscreensaver/xscreensave...
2013-02-08 Zygo Blaxellslackware.bholcomb.com/slackware/slackware-11.0/source...