against the total number of processors. If not oversubscribing, emit
the MCA environment variable mpi_paffinity_processor with the
processor number to bind the process to. This parameter is picked up
during MPI_Init (i.e., ompi_mpi_init()) and used to bind the process,
but currently iif the MCA param mpi_paffinity_alone is set to a
nonzero value (i.e., the user asks for it).
This commit was SVN r6906.