/usr/share/doc/libnini-cil-dev/changelog.Debian.gz is in libnini-cil-dev 1.1.0+dfsg.2-5.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/share/doc/libnini-cil-dev/../libnini1.1-cil/changelog.Debian.gz