452188 Delay dispatch until content optimisation

Added module and xml support

jetty-server/src/main/config/etc/jetty.xml

@@ -85,6 +85,7 @@
       <Set name="sendServerVersion"><Property name="jetty.send.server.version" default="true" /></Set>
       <Set name="sendDateHeader"><Property name="jetty.send.date.header" default="false" /></Set>
       <Set name="headerCacheSize">512</Set>
+      <Set name="delayDispatchOnContent"><Property name="jetty.delayDispatchOnContent" default="false"/></Set>
       <!-- Uncomment to enable handling of X-Forwarded- style headers
       <Call name="addCustomizer">
         <Arg><New class="org.eclipse.jetty.server.ForwardedRequestCustomizer"/></Arg>

jetty-server/src/main/config/modules/server.mod

@@ -45,5 +45,5 @@ jetty.send.date.header=false
 jetty.dump.start=false
 # Dump the state of the Jetty server, before stop
 jetty.dump.stop=false
-
-
+# Enable delayed dispatch optimisation
+jetty.delayDispatchOnContent=false