-- Add "scontrol show dwstat" command to display Cray burst buffer status.
 -- Add "GetSysStatus" option to burst_buffer.conf file. For burst_buffer/cray
    this would indicate the location of the "dwstat" command.

Missed some debug statements

Bug 4455

This makes it so if the user doesn't request any GRES they are denied
all the GRES with devices.  Before this would only happen for the GRES
type the user requested.

Bug 4455

Fix to purge old jobs using burst buffer if slurmctld daemon restarted
    after the job's burst buffer work was already completed.

Bug 4455

Leave end-time as set by _end_null_job() intact.

Enable jobs with zero node count for creation and/or deletion of
persistent burst buffers.
    * The partition default MinNodes configuration parameter is now 0
      (previously 1 node).
    * Zero size jobs disabled for job arrays and heterogeneous jobs, but
      supported for salloc, sbatch and srun commands.

Bug 4378.

Fix memory leak of MailDomain configuration string when slurmctld daemon
   is reconfigured.
bug 4272 (comment 35)

Bug 4384

Bug 4450

the libslurmfull.

In my testing with the cray job_submit plugin enabled it caused a
delay of the last step most likely because the gres wasn't ready quick
enough.

This reverts commit f9977ee5.

Since it's not needed in 17.11

slurm_load_job() prior to 17.11 returns the error code in errno and not
in rc.  With the addition of 47175901 if a job is removed from memory
before sbatch checks for the job again, sbatch could get in an loop
checking for the job. This only happens if you have a very small
MinJobAge (<10) -- which is not recommended.