Build out sufficient plumbing such that a temporary XAUTHORITY file
can be used that is local to the compute node, thus avoiding lock
contention on ~/.Xauthority on parallel filesystems.

This commit only includes the requisite plumbing to pass this around.

If this is not used, a null string results, and the XAUTHORITY env var
will not be forced into the user environment.

Add support and fix the modified API call in pam_slurm_adopt while here.

Bug 3647.

Update slurm.spec and slurm.spec-legacy as well.

The lower limit of 1024 may be too short for srun with large-scale
jobs, and lead to problems processing task completion messages in a
timely fashion.

Rather than adjust that, unify the two separate macros into
SLURM_DEFAULT_LISTEN_BACKLOG with the higer 4096 value.

Bug 5164.

Without Delegate=yes, systemd will "fix" the cgroup hierarchies whenever
'systemctl daemon-reload' is called, which will then remove any
restrictions placed on memory or device access for a given job.

This is a problem especially since 'systemctl daemon-reload' may be called
automatically by rpm/yum or a variety of config file mangers, leading to
jobs escaping from slurmd/slurmstepd's control.

This setting should work for systemd versions >= 205.
https://www.freedesktop.org/wiki/Software/systemd/ControlGroupInterface/

Bug 5292.

addresses problem reported by clang

bug introduced in commit a7d9313d

When a job with time_end=0 and TRES null exists from an association that is
currently inside a reservation, the hourly rollup segfaults.

Bug 5143

And from underlying slurm_msg_sendto_timeout call as well.

Add function to clear total_gres at start of scheduling cycle
Modify logic to avoid overflow on gpu counter

As reported by Avalon Johnson on slurm-users
https://groups.google.com/forum/#!topic/slurm-users/BsMQ7Uk1PLw
Bug 5287.

bug 4373, comment #24

Removed the sentence which incorrectly stated that when not using the
gres flag enforce-binding option, cpus other than the ones defined in gres.conf
could be used for a gpu.

Bug 5189

srun was already fixed in b7053bda (Bug 3294).

Bug 5126

bug 5189

Add salloc/sbatch/srun option of --gres-flags=disable-binding to disable
    filtering of CPUs with respect to generic resource locality. This option is
    currently required to use more CPUs than are bound to a GRES (i.e. if a GPU
    is bound to the CPUs on one socket, but resources on more than one socket
    are required to run the job). This option may permit a job to be allocated
    resources sooner than otherwise possible, but may result in lower job
    performance.
bug 5189

'have_innodb' is deprecated.

Bug 5317.

Cleanup printf formaters and ensure they match the types:
%zu for size_t
%zd for ssize_t

Bug 5417.

When printing arrays in squeue and setting the SLURM_BITSTR_LEN variable to 0
or to NULL, the length of the output defaulted to 64, when the documentation
says it will default to "unlimited". This patch fixes this situation.

Bug 5440

Because of a bug in the some versions of the Linux kernel, disable
constraining kernel memory space with cgroups by default.

Bug 5223.

Coverity CID 186991

Logic was switched around in 17.11, enable_user_top is now the
correct option.

Bug 5165.

This is not working reliably even when setting
SchedulerParameters=enable_hetero_steps and/or using OpenMPI with Slurm's
mpi/pmi2, as it was previously documented.

Bug 5309.

Bug 5426.

Bug 5426.

Bug 5426.