dnsdist: Add missing 'sys' import in the Async regression test

As noticed by Charles-Henri (thanks!).

diff --git a/regression-tests.dnsdist/test_Async.py b/regression-tests.dnsdist/test_Async.py
index efda4f4cc7317e9164777e6e64e8a807e5585002..8be405df6dde1c1d76996404356dab7b07388047 100644 (file)
--- a/regression-tests.dnsdist/test_Async.py
+++ b/regression-tests.dnsdist/test_Async.py
@@ -2,6 +2,7 @@
 
 import os
 import socket
+import sys
 import threading
 import unittest
 import dns