RootAccessFilter doesn't work for the Docker image packaged by AML

[songpeidu]

RootAccessFilter checks "GET / HTTP/1.1" in the response message while in the docker image packaged by AML there is an Nginx reverse proxy in front of the inference server, and the proxy HTTP version is 1.0 by default.

The filter doesn't work for this and fails to remove the health check from the access log.

Could we update RootAccessFilter to check "GET / HTTP/1.0" as well?

Thanks!