Subject: [TLS] PR# CertificateRequest extensions

From: Eric Rescorla <[email-masked]>
Date: Tue, 29 Nov 2016 22:03:38 -0500

As discussed in issue #760 and Seoul, I've prepared a PR that moves most all
of CertificateRequest into extensions:

https://github.com/tlswg/tls13-spec/pull/791

This got a little more complicated than I anticipated because I had to
actually
define a certificate_authorities extension and I decided to give it some
semantics
when the client sent it (displacing trusted_ca_keys, which seems unused and
kinda busted).

Target merge date: Friday.

-Ekr