code: private void addJsr160DispatcherIfExternallyConfigured(Configuration pConfig) {
          String dispatchers = pConfig.get(ConfigKey.DISPATCHER_CLASSES);
          String jsr160DispatcherClass = "org.jolokia.jsr160.Jsr160RequestDispatcher";
  
          if (dispatchers == null || !dispatchers.contains(jsr160DispatcherClass)) {
              for (String param : new String[]{
                  System.getProperty("org.jolokia.jsr160ProxyEnabled"),
                  System.getenv("JOLOKIA_JSR160_PROXY_ENABLED")
              }) {
                  if (param != null && (param.isEmpty() || Boolean.parseBoolean(param))) {
                      {
                          pConfig.updateGlobalConfiguration(
                              Collections.singletonMap(
                                  ConfigKey.DISPATCHER_CLASSES.getKeyValue(),
                                  (dispatchers != null ? dispatchers + "," : "") + jsr160DispatcherClass));
                      }
                      return;
                  }
              }
              if (dispatchers == null) {
                  // We add a breaking dispatcher to avoid silently ignoring a JSR160 proxy request
                  // when it is now enabled
                  pConfig.updateGlobalConfiguration(Collections.singletonMap(
                      ConfigKey.DISPATCHER_CLASSES.getKeyValue(),
                      Jsr160ProxyNotEnabledByDefaultAnymoreDispatcher.class.getCanonicalName()));
              }
          }
      }
docs: Add the JsrRequestDispatcher if configured via a system property or env variable.
  The JSR160 dispatcher is disabled by default, but this allows to enable it again
  without reconfiguring the servlet
  
  @param pConfig configuration to update