/usr/share/doc/libsipwitch-dev/NEWS.gz is in libsipwitch-dev 1.6.1-2build2.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/share/doc/libsipwitch-dev/../libsipwitch1/NEWS.gz
/usr/share/doc/libsipwitch-dev/../libsipwitch1/NEWS.gz