Set ETF delta in microseconds instead of nanoseconds in the wrapper script

scripts/run_client

@@ -26,7 +26,7 @@ while getopts "bd:e:o:ghi:p" opt; do
         ;;
     e )
         use_etf=1
-        delta=${OPTARG}
+        delta=$((${OPTARG}*1000))
         qdisc_options+="-e $delta"
         ;;
     o )