/usr/share/doc/libjglobus-gridftp-java/changelog.Debian.gz is in libjglobus-gridftp-java 2.1.0-3.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/share/doc/libjglobus-gridftp-java/../libjglobus-parent-java/changelog.Debian.gz