/usr/share/doc/libvpx1-dbg/README.gz is in libvpx1-dbg 1.3.0-2.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/share/doc/libvpx1-dbg/../libvpx1/README.gz
/usr/share/doc/libvpx1-dbg/../libvpx1/README.gz