Avahi-dnsconfd new pre-removal script throws an error when updating
Solution 1:
From https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=768620
sudo systemctl disable avahi-daemon
sudo apt-get upgrade
sudo systemctl enable avahi-daemon
From https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=768620
sudo systemctl disable avahi-daemon
sudo apt-get upgrade
sudo systemctl enable avahi-daemon