Add socket constant IPV6_HDRINCL and maybe others

[Rosuav]

Feature or enhancement

Proposal:

# Currently:
sock.setsockopt(socket.IPPROTO_IPV6, 36, 1)
# Proposed:
sock.setsockopt(socket.IPPROTO_IPV6, socket.IPV6_HDRINCL, 1)

Has this already been discussed elsewhere?

I have already discussed this feature proposal on Discourse

Links to previous discussion of this feature:

https://discuss.python.org/t/adding-new-socket-options-specifically-socket-ipv6-hdrincl/104964

Linked PRs

• gh-141817: Add IPV6_HDRINCL constant to the socket module #141818