private VirtualServer createAdminVirtualServer(
final Transaction t,
final Config config_w) throws TransactionFailure, PropertyVetoException {
final HttpService hs_w = t.enroll(config_w.getHttpService());
final VirtualServer vs_w = hs_w.createChild(VirtualServer.class);
hs_w.getVirtualServer().add(vs_w);
vs_w.setId(ASADMIN_VS_NAME);
vs_w.setNetworkListeners(ADMIN_LISTENER_NAME);
return vs_w;
}