/usr/share/doc/libfreeradius-client-dev/changelog.Debian.gz is in libfreeradius-client-dev 1.1.6-7.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/share/doc/libfreeradius-client-dev/../libfreeradius-client2/changelog.Debian.gz