The DHCPv6 server dhcpy6d now has a new home: https://dhcpy6d.de.
It is hosted on Github Pages in its own repository made with Jekyll.
The move has consequences for the URLs in the Debian and CentOS repository - please check them at https://dhcpy6d.de/download. Due to changed signing keys there would have been trouble even if the URLs were redirected so the decision was made to do a hard cut.