/usr/share/doc/libcurl4-gnutls-dev/NEWS.Debian.gz is in libcurl4-gnutls-dev 7.35.0-1ubuntu2.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/share/doc/libcurl4-gnutls-dev/../libcurl3-gnutls/NEWS.Debian.gz