[OMPI users] OpenMPI, Slurm and MPI_Comm_spawn

[Mccall, Kurt E. (MSFC-EV41) via users]

The Slurm MPI User's Guide at https://slurm.schedmd.com/mpi_guide.html#open_mpi 
has a note that states:

NOTE: OpenMPI has a limitation that does not support calls to MPI_Comm_spawn() 
from within a Slurm allocation. If you need to use the MPI_Comm_spawn() 
function you will need to use another MPI implementation combined with PMI-2 
since PMIx doesn't support it either.

Is this still true in OpenMPI 4.1?

Thanks,
Kurt