DHCP-to-DNS script IPv6 support

[KuxaBeast]

I have used a similar script to dhcp-to-dns for assigning static DNS records to IPv4 addresses and previously modified it to also generate records for IPv6 addresses based on DHCPv4 leases' MAC address and IPv6 Neighbor List entries. I haven't thought about it much before, so there might be some scenario where this kind of solution misbehaves. Nevertheless, I believe we deserve some way to implement DNS auto-configuration for IPv6 as well...

Is this feature wanted or is the dhcp-to-dns script considered feature-complete? Would perhaps a separate script implementing this feature be welcomed or does this feel too hacky?