Code review comment for ~ahasenack/ubuntu/+source/squid:fix-rotate-assertion-1794553

DEP8 tests passed

Manual test:
root@cosmic-squid-assertion-error:~# apt-cache policy squid
squid:
  Installed: 4.1-1ubuntu2
  Candidate: 4.1-1ubuntu2
  Version table:
 *** 4.1-1ubuntu2 500

root@cosmic-squid-assertion-error:~# grep assertion /var/log/squid/cache.log
root@cosmic-squid-assertion-error:~#

root@cosmic-squid-assertion-error:~# squid -k rotate
root@cosmic-squid-assertion-error:~# grep assertion /var/log/squid/cache.log
2018/10/09 20:19:42 kid1| assertion failed: comm.cc:428: "!isOpen(conn->fd)"

Installing update from the bileto ppa:
root@cosmic-squid-assertion-error:~# apt-cache policy squid
squid:
  Installed: 4.1-1ubuntu3~ppa1
  Candidate: 4.1-1ubuntu3~ppa1
  Version table:
 *** 4.1-1ubuntu3~ppa1 500
        500 http://ppa.launchpad.net/ci-train-ppa-service/3462/ubuntu cosmic/main amd64 Packages

root@cosmic-squid-assertion-error:~# > /var/log/squid/cache.log
root@cosmic-squid-assertion-error:~# grep assertion /var/log/squid/cache.log
root@cosmic-squid-assertion-error:~# squid -k rotate
root@cosmic-squid-assertion-error:~# grep assertion /var/log/squid/cache.log
root@cosmic-squid-assertion-error:~#

Tagging and uploading.