[pim] Updates to draft-ietf-pim-igmp-mld-extension, WG input wanted

[Stig Venaas <[e-mail]>]

Dear pim WG

Based on the IESG evaluation of draft-ietf-pim-igmp-mld-extension I
have made some larger changes, please see
https://datatracker.ietf.org/doc/html/draft-ietf-pim-igmp-mld-extension-07.txt

There was a request to add experimental code-points. I've added 2, I
think that should be sufficient. Different experiments can use the
same code-points.

I was also asked to add a no-op TLV. This doesn't do much, but it
might perhaps allow testing of implementations to see whether they are
parsing TLVs correctly.

Finally, there were questions whether IETF Review is too strict for
assignment of code-points. In my opinion we should be cautious with
new extensions and IETF Review allows us to carefully review any
extensions in the IETF. Alternatively we could for instance have
relaxed it to just require a specification (this could be any
document, not requiring review). Please let me know if you believe we
should relax this.

Hoping to get input within two weeks (May 25th), so that we can move
ahead with the publication, or revise as needed. Mike, let me know if
we need to do anything else to get sufficient review.

Thanks,
Stig