[w3c/webauthn] 1bd925: Added a third option

  Branch: refs/heads/balfanz-patch-4
  Home:   https://github.com/w3c/webauthn
  Commit: 1bd925facbcbc63bbddf5475f74e3fbdd7403e28
      https://github.com/w3c/webauthn/commit/1bd925facbcbc63bbddf5475f74e3fbdd7403e28
  Author: balfanz <dirk@balfanz.net>
  Date:   2017-11-11 (Sat, 11 Nov 2017)

  Changed paths:
    M index.bs

  Log Message:
  -----------
  Added a third option

And changed "low-cost" to "none".