jetty-spdy/spdy-http-server/src/main/config/etc/protonego-npn.xml

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE Configure PUBLIC "-//Jetty//Configure//EN" "http://www.eclipse.org/jetty/configure_9_0.dtd">

<Configure id="protonego" class="org.eclipse.jetty.spdy.server.NPNServerConnectionFactory">
    <Arg name="protocols">
	<Array type="String">
	    <Item>spdy/3</Item>
	    <Item>spdy/2</Item>
	    <Item>http/1.1</Item>
	</Array>
    </Arg>
   
    <Set name="defaultProtocol">http/1.1</Set>

    <!-- =========================================================== -->
    <!-- Enables NPN debugging on System.err                         -->
    <!-- ===========================================================
     <Set class="org.eclipse.jetty.npn.NextProtoNego" name="debug" type="boolean">true</Set>
    -->

</Configure>