al., &#34;Hypertext Transfer Protocol (HTTP/1.1):
        Conditional Requests&#34;, <a href="http://fakehost/test/rfc7233">RFC7233</a>, June 2014.

    [<a name="ref-SPDY" id="ref-SPDY">SPDY</a>]
        Mark Belshe, Roberto Peon, &#34;SPDY Protocol - Draft 3.1&#34;, <a href="http://www.chromium.org/spdy/spdy-protocol/spdy-protocol-draft3-1">http://</a>
        <a href="http://www.chromium.org/spdy/spdy-protocol/spdy-protocol-draft3-1">www.chromium.org/spdy/spdy-protocol/spdy-protocol-draft3-1</a>,
       