Don't let the web server log to stdout/err

tox.ini

@@ -28,7 +28,7 @@ commands =
     tar -C {envtmpdir} -vxf {toxinidir}/tests/integration/net.tar
     bash {envtmpdir}/net/start.sh
     bash -c "time python3 {envtmpdir}/net/wait.py {envtmpdir}/net/{auth,relay,exit}*"
-    bash -c "python3 {toxinidir}/scripts/tools/sbws-http-server.py --port 28888 &"
+    bash -c "python3 {toxinidir}/scripts/tools/sbws-http-server.py --port 28888 &>/dev/null &"
     sleep 30
     wget -O/dev/null http://127.0.0.1:28888/sbws.bin
     coverage run -a --rcfile={toxinidir}/.coveragerc --source=sbws -m pytest -s {toxinidir}/tests/integration -vv