improve niceness scripts
diff --git a/releng.control/ant_med_priority.sh b/releng.control/ant_med_priority.sh
index c683065..df913a1 100644
--- a/releng.control/ant_med_priority.sh
+++ b/releng.control/ant_med_priority.sh
@@ -20,5 +20,5 @@
 fi
 
 
-echo "Running ant at priority +10"
-exec nice --adjustment 10 "${RELENG_CONTROL}/ant.sh" "$@"
+echo "Running ant at priority " $JOB_NICE
+exec nice --adjustment $JOB_NICE "${RELENG_CONTROL}/ant.sh" "$@"