Add centralized start/stop/restart scipts.
    
    This adds centralized start, stop, and restart scripts
    for ns-slapd.  These scripts live in the sbin directory
    and will act upon all instances if an instance identifier
    is not specified (similar to the init script).  The
    instance specific scripts have been modified to call the
    new centralized scripts.
    
    The instance specific parameters needed by the new scripts
    are located in the instance specific initconfig scripts,
    which are now created by setup-ds.pl with values mapped
    from the inf file.