/usr/share/doc/freerdp2-shadow-x11/changelog.Debian.gz is in freerdp2-shadow-x11 2.0.0~git20170725.1.1648deb+dfsg1-7.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/share/doc/freerdp2-shadow-x11/../libwinpr2-2/changelog.Debian.gz