/usr/share/doc/libsasl2-2/changelog.Debian.gz is in libsasl2-2 2.1.25.dfsg1-17build1.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/share/doc/libsasl2-2/../libsasl2-modules-db/changelog.Debian.gz