use remote backend single-threaded

let's see if this make WEBrick/Travis happy

diff --git a/regression-tests/start-test-stop b/regression-tests/start-test-stop
index e3ff8f60568b0349913200367043395272d485f0..085f76b0e9b99e6557f08a6d068250cc69a2190e 100755 (executable)
--- a/regression-tests/start-test-stop
+++ b/regression-tests/start-test-stop
@@ -1057,7 +1057,7 @@ EOF
                        $RUNWRAPPER $PDNS --daemon=no --local-port=$port --socket-dir=./ \
                                --no-shuffle --launch=remote \
                                --query-logging --loglevel=9 --cache-ttl=$cachettl --no-config \
-                               --send-root-referral \
+                               --send-root-referral --distributor-threads=1 \
                                --allow-2136-from=127.0.0.0/8 --experimental-rfc2136=yes \
                                --remote-connection-string="$connstr" $remote_add_param &