Hello,

  if I understand corrently, the use of CNAME is just a convenience
and no technical feature, right?

In lots of examples on the net, a zonefile for a domain might contain
things similar to this:

  @ORIGIN example.com.
  ..
  myhost               A        1.2.3.4
  www                  CNAME    myhost.example.com.
  www1                 CNAME    myhost.example.com.
  someapp              CNAME    myhost.example.com.
  xyz                  CNAME    myhost.example.com.
  ...

Often, the webserver and other applications are not actually
running on node 1.2.3.4, but are internally portforwarded to
some other node, for various reasons.

Now we add an IPv6 address for 'myhost'. But portforwarding
doesn't work for IPv6. Instead we are required to use different
addresses all over, like so:

NOT CORRECT:
  myhost               A        1.2.3.4
  myhost               AAAA     4321::1
  www                  CNAME    myhost.example.com.
  www                  AAAA     4321::10
  ...

Or, NOT CORRECT:
  myhost               A        1.2.3.4
  myhost               AAAA     4321::1
  internal             AAAA     4321::10
  www                  CNAME4   myhost.example.com.
  www                  CNAME6   internal.example.com.
  ...

So, how would you do it? Is there a nice and elegant way?
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