Bug introduced in commit 11a75ff4

Time limit was incorrectly changed when swapping qos. Now we check
qos/assoc/partition all together and deny the chang if not consistent.
Fixed how we check coordinator permissions. Rearranged the function to update
QOS before updating partition in order to enforce AllowQOS and DenyQOS options.
One memory leak and some comments fixed too.

Bug 4685

1. Identifies nodes which are unavailable to a specific job,
adding a call to filter_by_node_owner() in select_nodes()
 where the node list is generated.
2. Removes the "unavail_node_str" argument to select_nodes()
as it is no longer useful. This string originally was originally
generated once at the start of the job scheduling logic for all jobs,
but since each job can have a different set of
 unavailable nodes (dedicated to user, group, etc.)
so the same string for all jobs can be misleading.

Bug 4932.

Prevent from wrongly returning, ESLURM_NODE_NOT_AVAIL from _pick_best_nodes when some jobs are using "--exclusive=user"

Bug 4932.

Improve performance of 'squeue -u' when PrivateData=jobs is
enabled by moving the UID filter code ahead of the more expensive
PrivateData=job checks.

Bug 5056.

See commit 0dabf4e7.
Bug 4932.

regression from ef1f3e73.
Bug 4885.

If scaling_available_frequencies file is not available, then derive
values from scaling_min_freq and scaling_max_freq values. If
cpuinfo_cur_freq file is not available then try to use scaling_cur_freq.

bug 4910

Bug 4921

This should never happen, but it does harden the code

This is a refinement to commit 95ab36b3
and also applies to node feature weighting

bug 4968

Related to buffer create/destroy operation being supported with
both #BB and #DW prefix.

These are jobs that only create or destroy persistent burst buffers,
so some job data structure fields required by NHC are not available
and can cause an invalid memory reference

over any other nodes.

Bug 4968

allocated time than 100% (Flex reservations).

Bug 4968

Bug 4968

Bug 4968

This was noticed while running test7.12

This reverts commit 4d3dfc0a.

for reference from multiple places in the doc.