1. Ability to not display menus with Restart / Quit entries to make
   it possible implementing some "--no-restart" switch. Then not
   creating the entire submenu when only Restart / Quit switches are
   inside but still honor the "promote / no-promote" option for the
   rest of the menu output.

2. NLS output support for desktops and window managers that read
   entries like:

      name[en] = Test
      name[az] = Another Test

3. Support for missing window managers

4. Or, perhaps a more general option would be useful, that provides "pre"
   and "post" filenames that wmconfig will print before and after its normal
   output.  Then people could do lots of interesting stuff (like I have a
   "logout" menu and a "halt system" menu I'd like to appear below the
   "normal" menu).
