Always zero on non-BG systems, so remove entirely.

Also start removing BG code, and take out err_cpus which is
always zero on non-BG.

Unused, but missed during prior clean up since it is
split across files.

Both are always one. (On non-BG.)

Always one (non-BG), so just change these to the increment operator.

SELECT_NODEDATA_SUBGRP_SIZE is always zero on non-BG, so all
calling paths into this can be removed.

Removing the CLUSTER_FLAG_BG block forces some code up a tabspot,
making this look a bit uglier than indended.

Also, remove the error_cpus values, as those only applied to BG.

NODE_STATE_ERROR is only valid on a BlueGene, so make this
a no-op for now.

As done previously, this can be removed as it always returns zero:
select_g_select_nodeinfo_get(node_ptr->select_nodeinfo,
                             SELECT_NODEDATA_SUBCNT,
                             NODE_STATE_ERROR,
                             &err_cpus);

Simplify the resulting code, and remove CLUSTER_FLAG_BG code as well.

No functional changes, but do cleanup some style in these
updated blocks while copying.

No changes yet.

Helps avoid pointer soup like &((*msg)->node_scaling).
No functional change.

Mention in RELEASE_NOTES in the appropriate sections.

Tidy up function declarations and formatting while here.

This is always 0 on non-select/bluegene. Remove other
BlueGene-specific output from this block while here.

This is all leading up to removal of the node_scaling concept
from Slurm's internals.

Make it easier to use with designated initializers in the future.

If an array task exited with a RequeueExit* code, the array job wasn't
being marked as requeued.

Bug 5105

if any task in the array was requeued. This is a hint to use
"sacct --duplicates" to see the whole picture of the array job.

Bug 5105

Bug 5163

Bug 5163

Coverity CID 186480

Coverity CID 186420

bug was introduced in commit 074ef9a7
bug could result in infinite loop given some (many) job scripts

burst_buffer.conf - Add SetExecHost flag to enable burst buffer access
    from the login node for interactive jobs.

Coverity CID 186419 and 196422

And remove the initialization before all the calls to the function.

It is non-functional and the motivation is more a preventive thing
so that if we ever use slurm_mktime() we know tm_isdst is consistently
set to -1.

Bug 5230.

Bug 4887.

Disable setting triggers from non-root/slurm_user by default.

Bug 4887.

Coverity CID 186420

Coverity CID 186423

which were marked down due to ResumeTimeout.

If a cloud node was marked down due to not responding by ResumeTimeout,
the code inadvertently added the node back to the avail_node_bitmap --
after being cleared by set_node_down_ptr(). The scheduler would then
attempt to allocate the node again, which would cause a loop of hitting
ResumeTimeout and allocating the downed node again.

Bug 5264