Bug#866343: extlinux: Files in /etc/kernel/ not removed during upgrade

[Lukas Schwaighofer <lukas@schwaighofer.name>]

Hi Laurent,

thanks for reporting this problem.  Leftover files in /etc/kernel/*.d
are bad…  I made a bit of research and found out the following, all of
which happened during the jessie release cycle:

0. The syslinux installer is part of the syslinux binary package
1. Version 3:6.03~pre1+dfsg-2: The installer was moved from the
   extlinux binary package to a newly introduced syslinux-stuff binary
   package
2. Version 3:6.03~pre19+dfsg-1: The syslinux-stuff binary package was
   dropped (completely removing the extlinux installer from Debian)

So, as far as I can tell, every system that has syslinux since
pre-jessie (and was never reinstalled since) will have those leftover
files.

Fixing this now in unstable feels somewhat in vain… I will ask for
advise on how to best deal with this issue.  For now I wanted to
document my findings.

Regards
Lukas