These parameters allow DefaultServlet without unnecessary operations
code in [DefaultServlet L406](https://github.com/eclipse/jetty.project/blob/a12fd9ea033678b51158949a886792b74b42d0a9/jetty-servlet/src/main/java/org/eclipse/jetty/servlet/DefaultServlet.java#L406) 
[DefaultServlet L189](https://github.com/eclipse/jetty.project/blob/a12fd9ea033678b51158949a886792b74b42d0a9/jetty-servlet/src/main/java/org/eclipse/jetty/servlet/DefaultServlet.java#L189)