code: public InputStream getResourceAsStream (
          HttpServletRequest req, String path)
          throws IOException
      {
          return getResourceAsStream(_siteIdent.identifySite(req), path);
      }
docs: Loads the specific resource, from the site-specific jar file if one
  exists and contains the specified resource. If no resource exists
  with that path, null will be returned.
  
  @param req the http request for which we are loading a resource
  (this will be used to determine for which site the resource will be
  loaded).
  @param path the path to the desired resource.
  
  @return an input stream via which the resource can be read or null
  if no resource could be located with the specified path.
  
  @exception IOException thrown if an I/O error occurs while loading
  a resource.