/usr/share/doc/libapr-memcache-dev/changelog.Debian.gz is in libapr-memcache-dev 0.7.0-3.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/share/doc/libapr-memcache-dev/../libapr-memcache0/changelog.Debian.gz