/usr/share/doc/golang-pq-dev/changelog.Debian.gz is in golang-pq-dev 0.0~git20151007.0.ffe986a-1.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/share/doc/golang-pq-dev/../golang-github-lib-pq-dev/changelog.Debian.gz