/usr/share/doc/lxc/changelog.Debian.gz is in lxc 2.0.7-0ubuntu1~16.04.2.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/share/doc/lxc/../lxc1/changelog.Debian.gz
/usr/share/doc/lxc/../lxc1/changelog.Debian.gz