[w3c/webauthn] 825cce: Making "direct" description less ambiguous.

  Branch: refs/heads/balfanz-patch-4
  Home:   https://github.com/w3c/webauthn
  Commit: 825cce701d532364a78c7ace2918d1a6a64a0641
      https://github.com/w3c/webauthn/commit/825cce701d532364a78c7ace2918d1a6a64a0641
  Author: Akshay Kumar <akshayku@microsoft.com>
  Date:   2017-11-17 (Fri, 17 Nov 2017)

  Changed paths:
    M index.bs

  Log Message:
  -----------
  Making "direct" description less ambiguous.