/usr/share/doc/mono-addins-utils/changelog.Debian.gz is in mono-addins-utils 1.0+git20130406.adcd75b-4.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/share/doc/mono-addins-utils/../libmono-addins0.2-cil/changelog.Debian.gz