code: public void registerServlet (@Nonnull final Class <? extends Servlet> aServletClass,
                                 @Nonnull @Nonempty final String sServletPath,
                                 @Nonnull @Nonempty final String sServletName)
    {
      registerServlet (aServletClass, sServletPath, sServletName, (Map <String, String>) null);
    }
docs: Register a new servlet without servlet init parameters
  
  @param aServletClass
  The class of the servlet to be registered. May not be
  <code>null</code>.
  @param sServletPath
  The path where the servlet should listen to requests. May neither be
  <code>null</code> nor empty.
  @param sServletName
  The name of the servlet. May neither be <code>null</code> nor empty.