/usr/share/doc/libsphinxclient-dev/changelog.Debian.gz is in libsphinxclient-dev 2.0.4-1.1ubuntu2.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/share/doc/libsphinxclient-dev/../libsphinxclient-0.0.1/changelog.Debian.gz