add ipv6-literal.net support

[zhoreeq]

No description provided.

[rany2]

ipv6-literal.net is available for sale, it doesn't seem to be reserved by Microsoft anymore.

[rany2]

[zhoreeq]

@rany2 it still works in Windows, the informational website works too https://ipv6-literal.com/

[rany2]

@zhoreeq I don't think ipv6-literal.com is owned by Microsoft. Anyway considering Microsoft doesn't own ipv6-literal.net anymore and how non-standard it is, I don't think it's a big deal anyway

[rany2]

Why didn't Microsoft pick something like ipv6-literal.arpa which would have no chance of getting registered. Worst case it would be reserved by IANA

[zhoreeq]

@rany2 yo, It's fucking Microsoft after all!

Anyway, I see this as an option to do just what .meship thing does, and there is at least one user who might like to have that option. Implementing it as a coredns plugin will take me like 10 minutes.