[w3c/webauthn] 6a6bf4: add domain-only rationale in two places (#975)

  Branch: refs/heads/master
  Home:   https://github.com/w3c/webauthn
  Commit: 6a6bf465c54a8ad4737c8064587b668a38a679cc
      https://github.com/w3c/webauthn/commit/6a6bf465c54a8ad4737c8064587b668a38a679cc
  Author: =JeffH <mobileuser@kingsmountain.com>
  Date:   2018-07-06 (Fri, 06 Jul 2018)

  Changed paths:
    M index.bs

  Log Message:
  -----------
  add domain-only rationale in two places (#975)



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