/usr/share/doc/libwbclient-sssd/changelog.Debian.gz is in libwbclient-sssd 1.13.4-1ubuntu1.10.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/share/doc/libwbclient-sssd/../libsss-nss-idmap0/changelog.Debian.gz