
By default `openmpi` needs `rsh` from `openssh`, which is a somewhat redundant dependency for clusters using slurm. This PR adds a toggle to allow users to disable the ssh/rsh plm altogether.
By default `openmpi` needs `rsh` from `openssh`, which is a somewhat redundant dependency for clusters using slurm. This PR adds a toggle to allow users to disable the ssh/rsh plm altogether.