able to run the exact number of cpu minutes in the limit.

When poe is invoked (under srun) as user root, it generates a
cryptic error message. I've added a clear error message describing
the problem:
error: POE will not run as user root
Rather than just:
ERROR: 0031-620  pm_SSM_write failed in sending the user/environment for taskid 0

Previous logic would typically do list search to find job array elements.
This commit adds two hash tables for job arrays. The first is based upon
the "base" job ID which is common to all tasks. The second hash table
is based upon the sum of the "base" job ID plus the task ID in the array.
This will substantially improve performance for handling dependencies
with job arrays.

When slurmctld restarted, it would not recover dependencies on
job array elements and would just discard the depenency. This
corrects the parsing problem to recover the dependency. The old code
would print a mesage like this and discard it:
slurmctld: error: Invalid dependencies discarded for job 51: afterany:47_*

When adding or removing columns to most data types (jobs, partitions,
nodes, etc.) on some system types an abort is generated. This appears
to be because when columns displayed change, on some systems that
changes the address of "model", while on others the address does not
change (like my laptops). This fix explicitly sets the last_model to
NULL when the columns are changed rather than relying upon the data
structure's address to change.

be setup for 1 node jobs.  Here are some of the reasons from IBM...

1. PE expects it.
2. For failover, if there was some challenge or difficulty with the
   shared-memory method of data transfer, the protocol stack might
   want to go through the adapter instead.
3. For flexibility, the protocol stack might want to be able to transfer
   data using some variable combination of shared memory and adapter-based
   communication, and
4. Possibly most important, for overall performance, it might be that
   bandwidth or efficiency (BW per CPU cycles) might be better using the
   adapter resources.  (An obvious case is for large messages, it might
   require a lot fewer CPU cycles to program the DMA engines on the
   adapter to move data between tasks, rather than depend on the CPU
   to move the data with loads and stores, or page re-mapping -- and
   a DMA engine might actually move the data more quickly, if it's well
   integrated with the memory system, as it is in the P775 case.)

If srun invoked with the --multi-prog option, but no task count, then use
the task count provided in the MPMD configuration file.

suite.

performance.

Conflicts:
	src/slurmctld/job_scheduler.c

than you really have.

doesn't get chopped off.

    a minus sign for options was intended.

correctly.