/usr/share/doc/libnetcf-dev/README is in libnetcf-dev 1:0.2.3-4ubuntu1.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/share/doc/libnetcf-dev/../libnetcf1/README
/usr/share/doc/libnetcf-dev/../libnetcf1/README