Bug#915261: SysV init regression thanks to broken "container detection" logic

[GSR]

Package: udev
Version: 239-14
Followup-For: Bug #915261

I tried to set severity to serious but it was reverted. An unbootable
system is not nice, I had to look around for a rescue disk (luckly I
still had one around) to change the script (it was obvious by message,
and also I roughly remembered the etckeeper diff). It could be a bit
more troublesome if combined (no other local machines to help, no USB
sticks, issues in remote machines, failures without output...).

---8<---
if [ -w /sys ]; then
  log_warning_msg "udev does not support containers BUT BUG WORKAROUND"
  # exit 0
fi
--->8---

Bug 915415 is about losing X11 mouse and keyboard, which is bad
too. Bug 915361 was reported as grave.

Avoiding more people to get into issues when cause is known seems
reasonable, it saves everyone time. I don't mind finding new bugs and
help solving them, but getting hit by old ones like this is
discouraging.

Confused about apt-listbugs purpose,
GSR