Continuation of 1f607747

This allows a job_requeue to respond on a persistent connection if
needed.

node state.

# Conflicts:
#	src/slurmctld/node_mgr.c

from the slurm.conf when using FastSchedule=0.

cray/burst_buffer - If slurmctld daemon restarts with pending job and burst
    buffer having unknown file stage-in status, teardown the buffer, defer the
    job, and start stage-in over again.
bug 3295

Add more detail to log message and change from error to debug2
  with an explanation of how this happens

bug 3314

No change in logic, just like up columns in an array structure

Add support for SALLOC_CONSTRAINT, SBATCH_CONSTRAINT and SLURM_CONSTRAINT
    environment variables to set default constraints for salloc, sbatch and
    srun commands respectively.
Bug 3317

limits after the node selection to make sure it doesn't violate those limits
and if it does change the reason for waiting so we don't reserve resources
on jobs violating accounting limits.

Bug 3029

The definition for "ConstrainCores" in the cgroup.conf parsing
   logic appeared twice. Remove the second definition.

Bug 3301.

node_features/knl_cray - Fix possible race condition when changing node
    state that could result in old KNL mode as an active features.
bug 3235

Fix void argument definitions as well. No functional changes.

Bug 3286.

No change in logic

cray/burst_buffer - Increase time to synchronize operations between threads
    from 5 to 60 seconds ("setup" operation time observed over 17 seconds).
    This should fix a race condition between a thread performing a buffer
    creation (setup) and a thread looking for unexpected buffers. If a
    buffer is found during the time window allowed for creation, it's
    space will be counted twice. First by the status checking thread
    and second by the thread doing the creation. The deallocation only
    happens once, so the used space information can be left with an
    invalid value.
bug 3295

Never used and is uninitialized making backtraces more confusing.
Fix whitespace in bcast_parameters struct while here.

No functional change.

static variable means multiple active decompression streams will corrupt
zlib's internal state, which can lead to a segfault.

Bug 3299.

On a reconfig, the exc_node_bitmap is cleared but then it was
not built again since last_work_scan was declared as a local static
variable in _do_power_work(). The fix is to make it global within the
plugin and reinitialize it to 0 on _init_power_config().

Bug 3078.

For example:
     Nodes=nid00001 CPU_IDs=2-3 Mem=1000 GRES_IDX=gpu:alpha(IDX:2)
     Nodes=nid00002 CPU_IDs=0-1 Mem=1000 GRES_IDX=gpu:alpha(IDX:0)