/usr/share/doc/libldap-2.4-2-dbg/changelog.Debian.gz is in libldap-2.4-2-dbg 2.4.28-1.1ubuntu4.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/share/doc/libldap-2.4-2-dbg/../libldap-2.4-2/changelog.Debian.gz