Add QUIC 31 in which the server's proof covers both the static server config as well as a hash of the client hello.

This will allow the QUIC whitelist in Chrome to be removed.

Merge internal change: 115261503

Review URL: https://codereview.chromium.org/1765603002

Cr-Commit-Position: refs/heads/master@{#380904}
30 files changed