This prevents a deadlock if some threads were unable to get all
return codes.

The new callbacks are not fleshed out, but eliminates a build error

Used for generic stack of slurmctld daemon plugins

function.

No change in logic yet, just a variable rename

Add squeue options to print array_job_id and array_task_id
Change the environment variables
 SLURM_ARRAY_JOBID to SLURM_ARRAY_JOB_ID and
 SLURM_ARRAY_ID to SLURM_ARRAY_TASK_ID
Substantial updates to web page

Put "switches" in alphabetic order
Remove "\n" from switches output, that adds extra space in display