/usr/share/doc/libfontconfig1-dev/AUTHORS is in libfontconfig1-dev 2.8.0-3ubuntu9.2.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/share/doc/libfontconfig1-dev/../libfontconfig1/AUTHORS
/usr/share/doc/libfontconfig1-dev/../libfontconfig1/AUTHORS