/usr/share/doc/python-egenix-mxproxy/changelog.Debian.gz is in python-egenix-mxproxy 3.2.9-1.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/share/doc/python-egenix-mxproxy/../python-egenix-mxtools/changelog.Debian.gz