/usr/share/doc/libbsd0-dbg/changelog.Debian.gz is in libbsd0-dbg 0.6.0-2ubuntu1.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/share/doc/libbsd0-dbg/../libbsd0/changelog.Debian.gz
/usr/share/doc/libbsd0-dbg/../libbsd0/changelog.Debian.gz