clear jobid from batch request unless explicitly set on command line 
  (don't use SLURM_JOBID env var). permits submitting new batch job from 
  within an existing job allocation.

srun execute line.

expliclty set on srun execute line, do not re-use it from 
the SLURM_JOBID env var (which prevents submitting a 
series of batch jobs).

(not yet fully implemented).

than SlurmUser or root.

in some xcpu implementations (e.g. SIGKILL not 9).

Warn user attempting to create a job allocation from within an existing job
    allocation.

within a currenly active job.

write fails.

nodes or partitions.

Keep job in completing state until all spawned tasks are terminated.

into a user section and a different one for the admins.