/usr/share/doc/kea-dhcp4-server/README is in kea-dhcp4-server 1.0.0-1build1.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/share/doc/kea-dhcp4-server/../kea-common/README
/usr/share/doc/kea-dhcp4-server/../kea-common/README