415548 migrate ProxyHTTPToSPDYTest to use HttpClient to avoid intermittent NPE
415548 migrate ProxyHTTPToSPDYTest to use HttpClient to avoid intermittent NPE part 2
416242 respect persistence headers in ProxyHTTPSPDYConnection
cleanup import in HttpConnection
415548 migrate ProxyHTTPToSPDYTest to use HttpClient to avoid intermittent NPE part 2
416251 ProxyHTTPToSPDYConnection now sends a 502 to the client if it receives a rst frame from the upstream spdy server
416251 ProxyHTTPToSPDYConnection now sends a 502 to the client if it receives a rst frame from the upstream spdy server