/usr/share/doc/pulseaudio-module-x11/README is in pulseaudio-module-x11 1:1.1-0ubuntu15.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/share/doc/pulseaudio-module-x11/../libpulse0/README
/usr/share/doc/pulseaudio-module-x11/../libpulse0/README