In your previous mail you wrote:

   > With V6ONLY you should be able to bind 0.0.0.0, 23 and bind ::,23 one
   > using AF_INET and the other AF_INET6.
   
   RFC2553 does not state this behaviour.

=> I disagree.

   in fact many implementations do not allow to do this.
   
=> fix them!

   can you explain better? let's take two sockets, an AF_INET and an
   AF_INET6+V6ONLY one. can i bind them on the same port only if i
   bind first to 0.0.0.0 and then to ::? or is it also correct to bind
   first to :: and then to 0.0.0.0?
   
=> both, V6ONLY removes possible interferences between IPv6 and IPv4 spaces.

   RFC2553 is silent about this.
   
=> 2553 bis is not, reread the V6ONLY spec.

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