Dynamic dns support for both ipv4 and ipv6 (not just one of them)
I tried out the new dynamic DNS system but it seems to only do either ipv4 or ipv6 depending on what connection the client made.
So I suggest support for both or either (by choice).
It would be more of a "hassle" as this would require 2 extra subdomains, one with only ipv4 A-record and the other ipv6.
This way it could work for both and if the user only wants one of them, they can only call one of the subdomains.