Spams cron errors when policyrcd-script-zg2 is installed

[Marti]

On all 13.10 machines where I have atop and policyrcd-script-zg2 installed, they send emails every night:

  Subject: Cron <root@X> invoke-rc.d atop _cron
  invoke-rc.d: action _cron is unknown, but proceeding anyway.

The fix is pretty straightforward, use "invoke-rc.d --quiet" in /etc/cron.d/atop

ProblemType: Bug
DistroRelease: Ubuntu 13.10
Package: atop 1.26-2
ProcVersionSignature: Ubuntu 3.11.0-15.25-generic 3.11.10
Uname: Linux 3.11.0-15-generic x86_64
ApportVersion: 2.12.5-0ubuntu2.2
Architecture: amd64
Date: Mon Mar 10 11:09:43 2014
InstallationDate: Installed on 2014-02-10 (27 days ago)
InstallationMedia: Ubuntu-Server 13.10 "Saucy Salamander" - Release amd64 (20131016)
MarkForUpload: True
ProcEnviron:
 LANGUAGE=en_US:en
 TERM=xterm
 PATH=(custom, no user)
 LANG=en_US.UTF-8
 SHELL=/usr/bin/zsh
SourcePackage: atop
UpgradeStatus: No upgrade log present (probably fresh install)

[Marti (intgr)]

Sorry, I added a Debian bug reference, but somehow now it thinks the bug is for "Dabo Application Framework for Python". I don't know what it should be.