/usr/share/doc/avahi-daemon/changelog.Debian.gz is in avahi-daemon 0.6.31-4ubuntu1.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/share/doc/avahi-daemon/../libavahi-common3/changelog.Debian.gz
/usr/share/doc/avahi-daemon/../libavahi-common3/changelog.Debian.gz