Support fetching protocol.json from /json/protocol

[auchenberg]

In the Edge Diagnostics Adaptor we have added new HTTP endpoint that allows clients to fetch the protocol.json on demand.

I propose that the client will try to fetch it from this endpoint if /json/version provides to be Edge, and otherwise fallback to the Chrome specific repo.

API: https://github.com/Microsoft/edge-diagnostics-adaptor/wiki/HTTP-endpoint

[cyrus-and]

I have this feature ready but I was wondering if the endpoint is really /protocol.json; it seems a bit inconsistent IMHO considering that the others are /json/version and /json/list. Wouldn't it be better to use /json/protocol instead?

[auchenberg]

Indeed. The endpoint should be /json/protocol.

[cyrus-and]

OK, so I'll push the change as is; give it a try and let me know.

[auchenberg]

Looking great! Next release of the adaptor will have the proper implemented API.