[webauthn] new commits pushed by balfanz

The following commits were just pushed by balfanz to https://github.com/w3c/webauthn:

* Clarifying signing procedure for U2F attestation

This closes #530
  by balfanz
https://github.com/w3c/webauthn/commit/5502d42d31d1aa5b6bc79f686cfecf0c6dbf04f5

Received on Monday, 18 September 2017 22:15:33 UTC