When not in a federation, or using --local, just go directly to the
cluster without spawning a thread.

Instead of packing an empty federation rec, just pack a NULL and return
a NULL.

This introduced a race condition between RPC messages starting
to be processed ahead of the plugin init() calls completing.

This reverts commit 6e65b5cb.

Bug 3646.

Only happens in a SPANK plugin on the setenv() call.
dyn_spank_set_job_env() in unaffected, and needs the NULL value for proper
backwards-compatibility.

Bug 3503.

This should have been part of commit f84456f3

This fixes test 7.17 to work with commit a152196f

Move the working_cluster_rec reference out of the following functions:
slurm_send_recv_controller_msg(), slurm_send_recv_controller_rc_msg(),
slurm_open_controller_conn_spec() and slurm_send_only_controller_msg()
so that communcations to multiple clusters can be performed in parallel
(using threads)

If a cluster in our federation is down, it's "control_host" value
is "" and an attempt to communicate with it will abort.

Previous content has news about version 16.05 release. Updated
for version 17.02 release.

[min|max]_cpus if not already set when a job comes in.

Change slurm_load_jobs(), slurm_load_job_user() and slurm_load_job()
to all use the same underlying function, which was formerly just
used by slurm_load_jobs(). This function will get data from all
of the clusters in a federation, but in a serial fashion for now.

The clang error isn't entirely clear, but this should fix it.

the job may still point to the qos_id of the removed qos.

the job_table.  This would represent the removal of runaway jobs.

I also made it work so the versions would be easy to see.  I couldn't easily
make this into multiple commits or I would had.

Add squeue --local and --sibling options to modify filtering of jobs on
    federated clusters.

Modify slurm_load_jobs() function to load job information from all clusters
    in a federation.

Fix double free issue from commit 3851f619

Same issue from fixed in a different spot with b19637bd.

Bug 3617

This reverts commit 8343365f.

Fix double free issue from commit 3851f619

Same issue from fixed in a different spot with b19637bd.

Bug 3617

Rename some scontrol show job fields to match sview
(and keep them in alphabetic order in the sview output):
ViableSiblings changed to FedViableSiblings and
ActiveSiblings changed to FedActiveSiblings

Added FedActiveSiblings, FedOrigin and FedViableSiblings to job info