2005-12-21  Brian Cameron  <brian.cameron@sun.com>

        Patch by Padraig O'Briain <Padraig.OBriain@sun.com>, modified by myself
        so it also works with gdmlogin and not just gdmgreeter.  Also I
        integrated his gdmprefetch.c utility into the configure/Makefile system
        with the --with-prefetch option.

        * configure.ac:  Now support --with-prefetch
        * daemon/gdm.h, daemon/gdmconfig.c, config/gdm.conf.in:  Support
          new PostDisplayProgram key.
        * gui/gdmcommon.[ch], gui/gdmlogin.c, gui/greeter/greeter.c:  Now
          support new PostDisplayProgram key.
        * docs/C/gdm.xml: Add docs for new key.
        * utils/Makefile.am, utils/gdmprefetch.c: Add new
          gdmprefetch utility.
        * config/Makefile.am: Now install gdm.conf file with 444
          permissions and always write over the installed gdm.conf
          after first moving aside the user's gdm.conf file if
          necessary.