Add SLURM_CPUS_PER_TASK to salloc,sbatch,srun man pages.

Bug 1331

doc/man/man1/salloc.1

@@ -1330,6 +1330,10 @@ The reservation ID on Cray systems running ALPS/BASIL only.
 \fBSLURM_CLUSTER_NAME\fR
 Name of the cluster on which the job is executing.
 .TP
+\fBSLURM_CPUS_PER_TASK\fR
+Number of cpus requested per task.
+Only set if the \fB\-\-cpus\-per\-task\fR option is specified.
+.TP
 \fBSLURM_DISTRIBUTION\fR
 Same as \fB\-m, \-\-distribution\fR
 .TP

doc/man/man1/sbatch.1

@@ -1571,6 +1571,10 @@ Name of the cluster on which the job is executing.
 \fBSLURM_CPUS_ON_NODE\fR
 Number of CPUS on the allocated node.
 .TP
+\fBSLURM_CPUS_PER_TASK\fR
+Number of cpus requested per task.
+Only set if the \fB\-\-cpus\-per\-task\fR option is specified.
+.TP
 \fBSLURM_DISTRIBUTION\fR
 Same as \fB\-m, \-\-distribution\fR
 .TP

doc/man/man1/srun.1

@@ -2224,6 +2224,10 @@ jobs, so the value indicates the total count of CPUs on the node.
 For the select/cons_res plugin, this number indicates the number of cores
 on this node allocated to the job.
 .TP
+\fBSLURM_CPUS_PER_TASK\fR
+Number of cpus requested per task.
+Only set if the \fB\-\-cpus\-per\-task\fR option is specified.
+.TP
 \fBSLURM_DISTRIBUTION\fR
 Distribution type for the allocated jobs. Set the distribution
 with \-m, \-\-distribution.