jobacct_gather/cgroup.

Support SLURM_CONF path which does not have "slurm.conf" as the file name.
bug 803

For a nested batch job (within an salloc, run "sbatch --jobid=$SLURM_JOBID ..."),
report the completing node rank as 0, rather than -1

If a job has non-responding node, retry job step create rather than
returning with DOWN node error.
bug 734

Also correct related documentation

Add force option to all file removals ("rm ..." to "rm -f ...").
bug 673

Completing nodes is removed when calling _try_sched() for a job, which
is the case in select_nodes(). If _try_sched() thinks the job can run
now but select_nodes() returns ESLURM_NODES_BUSY, the backfill loop will
be ended.

Do not resume a job with specialized cores on a node running another job
with specialized cores (only one can run at a time).
bug 792

Fix dead initialization and memory leak in nonstop

Conflicts:
	doc/man/man5/slurm.conf.5

Related to bug 795

Fix sinfo -R to print each down/drained node once, rather than once per
partition. This was broken in the sinfo change to process each partition's
information in a separate pthread.

Conflicts:
	src/sinfo/sort.c

Correct sinfo --sort fields to match documentation: E => Reason,
H -> Reason Time (new), R -> Partition Name, u/U -> Reason user (new)

Conflicts:
	src/slurmctld/job_mgr.c

it turns out SLES 11 SP3 (at least) defines it with a newline, so
this will be a problem for anyone building RPMs on that OS.

Without this patch, jobs with an infinite time limit would have
their preemption GraceTime ignored.