Subject: [quicwg/base-drafts] bf59b8: Add one to sample offset for header protection

From: Martin Thomson <[email-masked]>
Date: Wed, 17 Jul 2019 07:05:30 -0700

Branch: refs/heads/sample-offset
  Home:   https://github.com/quicwg/base-drafts
  Commit: bf59b827aeab949b66e62173dd6ec0f3c7d3d068
      https://github.com/quicwg/base-drafts/commit/bf59b827aeab949b66e62173dd6ec0f3c7d3d068
  Author: Martin Thomson <[email-masked]>
  Date:   2019-07-17 (Wed, 17 Jul 2019)

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

  Log Message:
  -----------
  Add one to sample offset for header protection

With the changes to invariants, this calculation was off by one.

Closes #2899.