[w3c/webauthn] f32a8e: Use RFC2119 for defined extensions

  Branch: refs/heads/level1-extensions
  Home:   https://github.com/w3c/webauthn
  Commit: f32a8ea3397e3285c60a4a49cea1525b0158b773
      https://github.com/w3c/webauthn/commit/f32a8ea3397e3285c60a4a49cea1525b0158b773
  Author: plehegar <plh@w3.org>
  Date:   2019-01-16 (Wed, 16 Jan 2019)

  Changed paths:
    M index.bs

  Log Message:
  -----------
  Use RFC2119 for defined extensions



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