/usr/share/doc/libfreeradius-dev/changelog.Debian.gz is in libfreeradius-dev 2.2.8+dfsg-0.1ubuntu0.1.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/share/doc/libfreeradius-dev/../libfreeradius2/changelog.Debian.gz