[TLS] new extension - domain hint

["Joshua Ball" <joshball@xxxxxxxxxxxxxxxxxxxxx>]

Hello,

I am creating a new TLS extension (a domain hint, sent by the client to
help the server map the clients certificate) and would like to ensure
some extension numbers and new handshake messages don't conflict with
any others. Do you have a protocol for choosing these numbers, or should
I just choose and submit to this list (and then an informational as
well).

If the latter, then here is what I suggest:
Currently, we need a new ExtensionType { client_domain(6) }
As well we need a new Handshake Message { client_domain_name(23) }

Otherwise, if these conflict with others, I am certainly open to
different numbers. 

As well, is there (or should there be) a list of known extensions and HS
messages?

Any thoughts? 


Thanks,
joshua


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