/usr/share/doc/libmono-debugging-soft-cil/changelog.Debian.gz is in libmono-debugging-soft-cil 0+20131201.3459502-1.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/share/doc/libmono-debugging-soft-cil/../libmono-debugger-soft-cil/changelog.Debian.gz