Hello Daniel:

You'll be happy to learn that we have addressed your request in our upcoming feature release, ISC DHCP 4.4.0, due out Q1/2018.  The dhcpd (-6) server will now update DNS entries for DHCPv6 static leases when update-static-leases is true.

We like to recognize our contributors by thanking them in our release notes.  If you would like to be noted in this way please respond with how you wish to be identified.

Regards,

Thomas Markwalder
ISC Software Engineering