Change "sched_params" to "power_params" because that's what it contains.

Added new SchedulerParameters options step_retry_count and step_retry_time
    to control scheduling behaviour of job steps waiting for resources.
bug 3121

Previous logic would always retry in 60 to 69 secs (based upon srun PID).
  New logic will wait up to SlurmctldTimeout + 9 secs (minimum value 60
  seconds, maximum 309 seconds).

This change can reduce RPCs sent by srun up to 50%.

Avoid using slurm_forward_data because it causes thread spawn that
introduces unwanted delays.

Bug 3102.

Counter became invalid due to re-use of a variable within a loop.

THis can happen due to signal/retry logic and the result is
  vestigial srun ports that are no longer valid and slurmctld
  sending messages to invalid ports to notify them about available
  resources as other steps complete

Fix indent and add brackets

Also correct the value of NICE_OFFSET used within the perl API.

Bug 3098.

Bug 3051.

Otherwise updates would be rejected for running jobs even if there
would be no impact. Most common when the job_submit plugin is overriding
QOS/GRES values on everything; without this change an update to "comment"
or other fields would fail with ESLURM_JOB_NOT_PENDING.

Bug 3117.

Never ever run NHC, even on an edge case that NHC_NO would still launch NHC
after.

Bug 3105.

Switch to list_for_each, and check if access list actually changed
after each update before updating last_prat_update. This prevents
the backfill scheduler from resetting mid-cycle unnecessarily.

Bug 3123.

Switch to list_for_each, and check if access list actually changed
after each update before updating last_prat_update. This prevents
the backfill scheduler from resetting mid-cycle unnecessarily.

Bug 3123.

Buffer was being allocated based upon the size of the wrong structure.
  The buffer would have been larger than required, so this bug
  should not have caused any failures.
bug 3127

Add protocol version to slurmd startup communications for slurmstepd to
    permit changes in the protocol.