/usr/share/doc/dbus-x11/README.gz is in dbus-x11 1.4.18-1ubuntu1.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/share/doc/dbus-x11/../libdbus-1-3/README.gz
/usr/share/doc/dbus-x11/../libdbus-1-3/README.gz