Bug#550201: this is an xscreensaver package installation script bug

[Vladimir Komendantsky]

It appears that there was an unwanted interaction between
gnome-screensaver and xscreensaver. The latter package wrote a script
/etc/X11/Xsession.d/80xscreensaver_start that was executed by
/etc/X11/Xsession and caused xscreensaver to load silently. Besides,
xscreensaver created an entry in Gnome "Startup Applications" named
XScreensaver and set it ON by default without noticing that there was
already an xscreensaver entry made by me (and set to OFF) and a
similar entry for gnome-screensaver that was ON.

Switching off the XScreensaver entry in Startup Applications did not
suffice and then I found the lower-level script 80xscreensaver_start.
Removing this script from /etc/X11/Xsession.d/80xscreensaver_start
resolved the inconsistency and now xscreensaver does not start.

Regards,
Vladimir