/usr/share/doc/libsasl2-modules-sql/changelog.Debian.gz is in libsasl2-modules-sql 2.1.26.dfsg1-14build1.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/share/doc/libsasl2-modules-sql/../libsasl2-modules/changelog.Debian.gz