Document and log cases where max jobs per user or partition is
  equal or greater than the max jobs test. In that case, a single
  user can easily stop all backfill scheduling.

doing a ntasks_per_core=1

Fix for job "--contiguous" option that could cause job allocation/launch
    failure or slurmctld crash.
bug 2573

Conflicts:
	META
	NEWS

constraints mattered in a job.

    Details include:
    A job doesn't request memory but the system is running
    with CR_*MEMORY with no default memory limit and the job requests nodes
    with features of different sizes.  Previously the order of constraints
    mattered where the smaller memory node would need to be requested first
    or the job would fail.

    Bug 2608

This reverts commit f559a55c.

constraints mattered in a job.

Details include:
A job doesn't request memory but the system is running
with CR_*MEMORY with no default memory limit and the job requests nodes
with features of different sizes.  Previously the order of constraints
mattered where the smaller memory node would need to be requested first
or the job would fail.

Bug 2608

Previous logic would get an account and/or QOS time limit and use
  that value to overwrite the incoming RPC's NO_VAL value, which
  would change a job's time limit when changing an unrelated
  field (e.g. priority, QOS, etc.).
bug 2610

Prevent use of NULL pointer and SEGV when changing a job's QOS when
  the slurmdbd is not configured.

bug 2609

These tests failed with MinJobAge=3, so when the tests looked for
  completed jobs, the job records had already been purged. Log this
  configuration as a possible reason for failure.

Conflicts:
	src/plugins/sched/backfill/backfill.c

Fix backfill scheduler race condition that could cause invalid pointer in
    select/cons_res plugin. Bug introduced in 15.08.9, commit:
    efd9d35e

The scenario is as follows
1. Backfill scheduler is running, then releases locks
2. Main scheduling loop starts a job "A"
3. Backfill scheduler resumes, finds job "A" in its queue and
   resets it's partition pointer.
4. Job "A" completes and tries to remove resource allocation record
   from select/cons_res data structure, but fails to find it because
   it is looking in the table for the wrong partition.
5. Job "A" record gets purged from slurmctld
6. Select/cons_res plugin attempts to operate on resource allocation
   data structure, finds pointer into the now purged data structure
   of job "A" and aborts or gets SEGV
Bug 2603

misleading.

instead of ID to make things easier to read.

# Conflicts:
#	src/common/gres.c

canceled while launching.