webapp_provider.setScanInterval(1);
webapp_provider.setExtractWars(true);
webapp_provider.setConfigurationManager(new PropertiesConfigurationManager());
deployer.addAppProvider(webapp_provider);
server.addBean(deployer);
// === setup jetty plus ==
Configuration.ClassList.setServerDefault(server).addAfter(
"org.eclipse.jetty.webapp.FragmentConfiguration",
"org.eclipse.jetty.plus.webapp.EnvConfiguration",