Add some diagrams to the IBM PE documentation
sreport - Fix by adding planned down time to utilization reports.
Record updated job time limit if modified by backfill

Without this change, if the job's time limit is modified down
toward --time-min by the backfill scheduler, update the job's
time limit in the database.
Do not report error when job step terminates while sstat is running
Merge branch 'slurm-2.5'

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