code: private static String key(String name) {
          return WHITE_SPACE.matcher(name).replaceAll(".").toLowerCase(Locale.ENGLISH);
      }
docs: Generate a simple key for the given name. This method normalises the name by
  converting to lower case and replacing spaces with '.' (e.g. "Buffer Size" is
  converted to "buffer.size").
  
  @param name the name of a setting
  
  @return keyed setting name