cman init: allow sysconfig/cman to pass options to dlm_controld
    
    DLM_CONTROLD_OPTS="" can now be used to pass startup options to the
    daemon.
    
    Resolves: rhbz#849048
    
    Signed-off-by: Fabio M. Di Nitto <fdinitto@redhat.com>
    Reviewed-by: Christine Caulfield <ccaulfie@redhat.com>