Clarify how job signal function presently works given no step_id (it

signals all job steps, but not the job script itself).

doc/man/man1/scancel.1

-.TH SCANCEL "1" "October 2003" "scancel 0.3" "Slurm components"
+.TH SCANCEL "1" "November 2003" "scancel 0.3" "Slurm components"
 .SH "NAME"
 scancel \- Used to signal jobs or job steps that are under the control of Slurm.
 .SH "SYNOPSIS"
@@ -52,7 +52,7 @@ Print the version number of the scontrol command.
 ARGUMENTS
 .TP
 \fIjob_id\fP
-The Slurm job ID of the job to have one of its steps or the entire job signaled.
+The Slurm job ID of the job to have one or more of its steps signaled.
 .TP
 \fIstep_id\fP
 The step ID of the job step to be signaled. If none is provided, then 

doc/man/man3/slurm_kill_job.3

-.TH "Slurm API" "3" "September 2003" "Morris Jette" "Slurm job signal calls"
+.TH "Slurm API" "3" "November 2003" "Morris Jette" "Slurm job signal calls"
 .SH "NAME"
 slurm_kill_job, slurm_kill_job_step \- Slurm job signal calls
 .SH "SYNTAX"
@@ -35,10 +35,12 @@ Slurm job step id number.
 Signal to be sent to the job or job step.
 .SH "DESCRIPTION"
 .LP 
-\fBslurm_kill_job\fR Request that a signal be sent to a job and all of its job steps. If the job is pending, it will be terminated immediately.This function 
-may only be successfully executed by the job's owner or user root.
+\fBslurm_kill_job\fR Request that a signal be sent to all steps of the specified job. 
+If the job is pending and the signal is SIGKILL, the job will be terminated immediately.
+This function may only be successfully executed by the job's owner or user root.
 .LP 
-\fBslurm_kill_job_step\fR Request that a signal be sent to a specific job step. This function may only be successfully executed by the job's owner or user root.
+\fBslurm_kill_job_step\fR Request that a signal be sent to a specific job step. 
+This function may only be successfully executed by the job's owner or user root.
 .SH "RETURN VALUE"
 .LP
 On success, zero is returned. On error, -1 is returned, and Slurm error code is set appropriately.