/usr/share/doc/libfontconfig1-dev/README.gz is in libfontconfig1-dev 2.11.0-0ubuntu4.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/share/doc/libfontconfig1-dev/../libfontconfig1/README.gz
/usr/share/doc/libfontconfig1-dev/../libfontconfig1/README.gz