jenkinsci/jenkins — pull request #1002 by mblair (2013-11-06 22:49:28+00:00)
Title: [FIXED JENKINS-20407] /var/run/jenkins may not exist

Test for the existence of `/var/run/jenkins` before trying to chown it in
the Debian post-install script.

This bug was introduced by [971491](https://github.com/jenkinsci/jenkins/commit/9714917685e2b50f59b4feda9bc4e561870a944f).