Strip non-alphanumeric lead chars in PBS job name

Ensure that the PBS job name starts with an alphanumeric character
[0-9A-Za-z], following the PBS scheduler requirement. To avoid failed
jobs solely on the account of a bad job name, strip all leading
non-alphanumeric characters from the job name. Note that the egsinp
basename is not affected, this is strictly for the job name passed to
qsub via the -N option.

HEN_HOUSE/scripts/egs-parallel-pbs

@@ -118,16 +118,12 @@ verbosity=$8
 ### link file descriptor 3 to egs-parallel log file
 exec 3>>$basename.egsparallel
 
-### set scheduler job name (maximum 14 characters)
-jobname=$(echo ${basename}[$nthread])
+### set scheduler job name (skip leading non alnum chars, maximum 14 characters)
+jobname=$(echo "${basename}[$nthread]" | sed 's/^[^[:alnum:]]*//')
 trim=$(( $(echo $jobname | wc -c) - 14 ))
 if [ $trim -gt 0 ]; then
     jobname=$(echo $jobname | cut -c $trim-)
 fi
-### job names can't start with a '.', hopefully the next character is OK
-if [[ ${jobname::1} == "." ]]; then
-    jobname="${jobname:1}"
-fi
 log "job name: $jobname"
 
 ### remove existing egsjob and lock files

HEN_HOUSE/scripts/egs-parallel-pbsdsh

@@ -108,16 +108,12 @@ exec 3>>$basename.egsparallel
 ### begin script
 log "BEGIN $0"
 
-### set scheduler job name (maximum 14 characters)
-jobname=$(echo ${basename}[$nthread])
+### set scheduler job name (skip leading non alnum chars, maximum 14 characters)
+jobname=$(echo "${basename}[$nthread]" | sed 's/^[^[:alnum:]]*//')
 trim=$(( $(echo $jobname | wc -c) - 14 ))
 if [ $trim -gt 0 ]; then
     jobname=$(echo $jobname | cut -c $trim-)
 fi
-### job names can't start with a '.', hopefully the next character is OK
-if [[ ${jobname::1} == "." ]]; then
-    jobname="${jobname:1}"
-fi
 log "job name: $jobname"
 
 ### create pbsdsh directory to store task files for job numbers (remove existing directory)