/usr/share/doc/librad0-tools/changelog.Debian.gz is in librad0-tools 2.12.0-5.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/share/doc/librad0-tools/../librad0/changelog.Debian.gz
/usr/share/doc/librad0-tools/../librad0/changelog.Debian.gz