/usr/share/doc/cgroup-bin/NEWS.Debian.gz is in cgroup-bin 0.38-1ubuntu2.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/share/doc/cgroup-bin/../libcgroup1/NEWS.Debian.gz
/usr/share/doc/cgroup-bin/../libcgroup1/NEWS.Debian.gz