/usr/share/doc/gridsite-dbg/changelog.Debian.gz is in gridsite-dbg 2.2.6-1build1.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/share/doc/gridsite-dbg/../libgridsite2/changelog.Debian.gz
/usr/share/doc/gridsite-dbg/../libgridsite2/changelog.Debian.gz