Add support for restoring a checkpoint created with a different version of Slurm.

    to release processes which TotalView does not attach to.

  web application

    has been modified to display and modify the new field. sched/backfill
    plugin has been changed to alter time limits of jobs with the
    --time-min option if doing so permit earlier job initiation.

v2.2 slurmd will work with an earlier slurmstepd.

release of slurm

    for jobs and job steps as a percentage of their real memory allocation.

    S_STEP_ALLOC_MEM. Support will remain for S_JOB_ALLOC_CORES and
    S_JOB_ALLOC_MEM.
Kill individual job steps that exceed their memory limit rather than
    killing an entire job if one step exceeds its memory limit.

Much functionality has been added to account_storage/pgsql.  The plugin is still in a very beta state.  It is still highly advised to use the mysql plugin, but if you feel like living on the edge or just really like postgres over mysql for some reason here you go. (Work done primarily by Hongjia Cao, NUDT.)

with slurm_get_state_save_location() to eliminate need
for locking.

modify test4.11 to match

 clean up some related code for reservations and partitions.