pmix/slurm: correctly set locality of the local ranks as "not found"
btl/vader: fix typos in the help file
btl/vader: more updates to the help messages
Add the ability for a tool that requests spawn of a job to also request forwarding of all output to the tool. The tool is responsible for its own call to push its stdin to the new job. The push request can come -after- the job is started, but the pull request has to be done during the spawn procedure or else output can be lost.