with step_layout=NULL and gid=SLURM_BATCH_SCRIPT and spank_fini() will
    be called immediately afterwards.

  select/linear

    task/affinity.

No significant change in fundamental logic.

gang scheduling if SelectTypeParameter=CR_Memory in slurm.conf.
Add will_run functionality to select/linear and hooks to other plugins.

    partition max_share parameter and tries to match like size jobs on the
    same nodes to improve gang scheduling performance.

 debug level at any time (Hongjia Cao, NUDT).

    with HostFormat=2 in the wiki.conf file.

    accounting data collection polling interval.

Added srun option --checkpoint-path for use with XLCH (Hongjia Cao, NUDT).

    files are opened ("t" for truncate, "a" for append).

    increased from 64KB (16-bit size field) to 4GB (32-bit size field).