cups cannot start after system update: missing conf (with fix)

[Benoît Rouits]

cups daemon does not start after update and reboot on December 12 2015.
message of /etc/init.d/cups status:
● cups.service - CUPS Scheduler
   Loaded: loaded (/lib/systemd/system/cups.service; enabled; vendor preset: enabled)
   Active: failed (Result: start-limit) since sam. 2015-12-12 20:01:39 CET; 5min ago
     Docs: man:cupsd(8)
  Process: 1569 ExecStart=/usr/sbin/cupsd -l (code=exited, status=1/FAILURE)
 Main PID: 1569 (code=exited, status=1/FAILURE)

déc. 12 20:01:39 grim systemd[1]: Started CUPS Scheduler.
déc. 12 20:01:39 grim systemd[1]: cups.service: Main process exited, code=exited, status=1/FAILURE
déc. 12 20:01:39 grim systemd[1]: cups.service: Unit entered failed state.
déc. 12 20:01:39 grim systemd[1]: cups.service: Failed with result 'exit-code'.
déc. 12 20:01:39 grim systemd[1]: cups.service: Start request repeated too quickly.
déc. 12 20:01:39 grim systemd[1]: Failed to start CUPS Scheduler.
déc. 12 20:01:39 grim systemd[1]: cups.service: Failed with result 'start-limit'.

uname -a:
Linux grim 4.2.0-19-generic #23-Ubuntu SMP Wed Nov 11 11:39:30 UTC 2015 x86_64 x86_64 x86_64 GNU/Linux

fix with a symbolic link: ln -s /etc/cups/cupsd.conf.O /etc/cups/cupsd.conf and cups starts well.

[Launchpad Janitor (janitor)]

Status changed to 'Confirmed' because the bug affects multiple users.