Stop porcess enhancement

ping_radar.sh

 	for pid in $(echo $pids)
 	do
 		echo killing $pid
-		kill $pid
-	done
-	for pid in $(echo $pids)
-	do
-		wait $pid
-		echo $pid killed
+		kill $pid 2>/dev/null
 	done
+	wait $(echo $pids)
 	rmdir ${res_file}.lock 2>/dev/null
 	rm -v $res_file
 	exit 0
 	for pid in $(echo $cidr_pids $cidr_nmap_pid)
 	do
 		echo CIDR killing $pid
-		kill $pid
-		wait $pid
-		echo CIDR $pid killed
+		kill $pid 2>/dev/null
 	done
+	wait $(echo $cidr_pids $cidr_nmap_pid)
 	rm -v $cidr_nmap_res
 	exit 0
 }