Spec file changes for nunc-stans
    
    Patch provided by rmeggins@redhat.com (Thank you, Rich!!)
    
    Note: Every time we need a bug fix of nunc-stans in 389, we'll have to
          make a new version of nunc-stans, tag it, and rebuild 389.
          To build without nunc-stans, set 0 to use_nunc_stans.