Bug#895477: gnome-screensaver: unmaintained upstream

[Simon McVittie]

On Wed, 11 Apr 2018 at 22:55:03 +0100, Simon McVittie wrote:
> gnome-screensaver is no longer part of GNOME, and is no longer maintained.

Additionally, the upstream git repository has been moved to
https://gitlab.gnome.org/Archive/gnome-screensaver and archived, so it
no longer accepts bug reports or merge requests, and there is no channel
to report security vulnerabilties.

I'm cc'ing the security team to ensure they are aware.

I've reported bugs in all reverse dependencies listed by `dak rm -R -n`,
and made them blockers of this bug. The most concerning reverse-dependency
is budgie-desktop.

    smcv