[webauthn] new commits pushed by equalsJeffH

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

* revert processing of allowList back to close to original, polish such that fix #387
  by JeffH

* revise to explictly handle empty credDescpList, may improve #481
  by JeffH

Received on Thursday, 1 June 2017 17:31:14 UTC