How to enable serving aliased files

<servlet>
  <servlet-name>default</servlet-name>
  <servlet-class>org.mortbay.jetty.servlet.DefaultServlet</servlet-class>
  . . .
   <init-param>
    <param-name>aliases</param-name>
    <param-value>false<value>true</param-value>
  </init-param>
  . . .

<sevlet>