tests/test-webapps/test-jetty-webapp/src/main/config/demo-base/webapps/test.d/override-web.xml

<?xml version="1.0" encoding="UTF-8"?>
<web-app 
   xmlns="http://xmlns.jcp.org/xml/ns/javaee" 
   xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
   xsi:schemaLocation="http://xmlns.jcp.org/xml/ns/javaee http://xmlns.jcp.org/xml/ns/javaee/web-app_3_1.xsd" 
   version="3.1"> 


<!-- This web.xml format file is an override file that is applied to the test webapp AFTER
     it has been configured by the default descriptor and the WEB-INF/web.xml descriptor -->

  <!-- Add or override context init parameter -->
  <context-param>
    <param-name>context-override-example</param-name>
    <param-value>a context value</param-value>
  </context-param>


  <!-- Add or override servlet init parameter -->
  <servlet>
    <servlet-name>Dump</servlet-name>
    <init-param>
      <param-name>servlet-override-example</param-name>
      <param-value>a servlet value</param-value>
    </init-param>
  </servlet>

  <!-- Add servlet mapping -->
  <servlet-mapping>
    <servlet-name>Dump</servlet-name>
    <url-pattern>*.more</url-pattern>
  </servlet-mapping>

  <!-- Reset servlet class and/or start order -->
  <servlet>
    <servlet-name>Session</servlet-name>
    <servlet-class>com.acme.SessionDump</servlet-class>
    <load-on-startup>5</load-on-startup>
  </servlet>
  
  <!-- Allow remote access to test webapp -->
  <!--
  <filter>
    <filter-name>TestFilter</filter-name>
    <filter-class>com.acme.TestFilter</filter-class>
    <async-supported>true</async-supported>
    <init-param>
      <param-name>remote</param-name>
      <param-value>true</param-value>
    </init-param>
  </filter>
  -->
  
</web-app>