IANA section slight reorg

[thomas-fossati]

Tom Petch's review: https://mailarchive.ietf.org/arch/msg/tls/Opmv1JCmY10uBKP1SrzfUpxhzCY/

s.10
I would find this clearer as three sections for the three IANA actions
10.1 new column for ExtensionType
10.2 new value for ExtensionType
10.3 new value for ContentType

"   IANA is requested to allocate an entry to the existing TLS
    "ExtensionType Values" registry, defined in [RFC5246],.."
well no; whatever you think of RFC8447 the name has changed
"   IANA is requested to allocate an entry to the existing "TLS
    ExtensionType Values" registry, defined in [RFC5246],.."
or, if you are picky (which I am not),
    IANA is requested to allocate an entry to the existing "TLS
    "ExtensionType Values" registry, defined in [RFC5246], and
    renamed by RFC8447

An extra column is added but I cannot see what value should be placed in
that column for existing entries.

"The tls12_cid ContentType is only applicable to DTLS 1.2."
Good information but I struggle to see what IANA will do with it; I see
nowhere for it to go.

[hannestschofenig]

#94