Subject: [quicwg/base-drafts] 7c41ea: Use the VERSION flag to identify 0-RTT packets

From: Martin Thomson <[email-masked]>
Date: Mon, 23 Jan 2017 16:25:49 -0800

Branch: refs/heads/0rtt_version_bit
  Home:   https://github.com/quicwg/base-drafts
  Commit: 7c41ea00b07e8c10fd29e5047f5f614e48b4597b
      https://github.com/quicwg/base-drafts/commit/7c41ea00b07e8c10fd29e5047f5f614e48b4597b
  Author: Martin Thomson <[email-masked]>
  Date:   2017-01-24 (Tue, 24 Jan 2017)

  Changed paths:
    M draft-ietf-quic-transport.md

  Log Message:
  -----------
  Use the VERSION flag to identify 0-RTT packets

This aligns the transport draft with the tls draft.

The primary reason for using this identification is that there are three types
of keys that are in concurrent use during a 0-RTT handshake: unprotected
(cleartext), 0-RTT and 1-RTT.  Identifying 0-RTT packets this way allows the
server to avoid trial decryption.