Use g_markup_printf_escaped so gdmsetup better handles description strings
    
    2006-09-27  Brian Cameron  <brian.cameron@sun.com>
    
            * gui/gdmsetup.c: Use g_markup_printf_escaped so gdmsetup better
              handles description strings that contains things similar to
              a tag like an email address.  Fix bug #357998.  Patch by
              Matthias Clasen <mclasen@redhat.com>.