code: public WebApplicationContext[] addWebApplications(String webapps)
          throws IOException
      {
          return addWebApplications(null,webapps,null,false);
      }
docs: Add Web Applications.
  Add auto webapplications to the server.  The name of the
  webapp directory or war is used as the context name. If a
  webapp is called "root" it is added at "/".
  @param webapps Directory file name or URL to look for auto webapplication.
  @exception IOException