/usr/share/doc/nut-cgi/README.gz is in nut-cgi 2.6.3-1ubuntu1.1.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/share/doc/nut-cgi/../libupsclient1/README.gz
/usr/share/doc/nut-cgi/../libupsclient1/README.gz