RFC2136 NSUPDATE support algo:name secret instead of algo: secret

[vg]

Example

nsupdate <<EOF
  server ns1.dynv6.com
  zone yourhost.dynv6.com
  update delete yourhost.dynv6.com A
  update add yourhost.dynv6.com 60 A 127.0.0.1
  update delete yourhost.dynv6.com AAAA
  update add yourhost.dynv6.com 60 AAAA ::1
  key hmac-sha256:_123._tsig.dynv6.com YourSHAREDsecret==
  send
EOF

instead of

key hmac-sha256: YourSHAREDsecret==

[ThomasWaldmann]

This issue tracker is about https://nsupdate.info/ software, not about the nsupdate commandline tool.

[vg]

@ThomasWaldmann My request was for https://nsupdate.info/ not nsupdate command.
Apart from the Nameserver update algorithm and Nameserver update secret, need an option to provide something like _123._tsig.dynv6.com to an external auth dns server.

Nameserver update algorithm
HMAC_SHA512 is fine for bind9 (you can change this later, if needed)

Nameserver update secret
Shared secret that allows updating this zone (base64 encoded)