Fixed sh5util loop when there are no node-step files.
Remove trailing spaces from docs
fix race condition in batch exit code

Fix race condition on batch job termination that could result in a job exit
code of 0xfffffffe if the slurmd on node zero registers its active jobs at
the same time that slurmstepd is recording the job's exit code.
but 535
Merge branch 'slurm-2.6'

Conflicts:
	NEWS
	doc/man/man5/cgroup.conf.5
fix bad merge