Merge branch 'tests_extra_updates_io_2' into 'master'

tests-extra: ixfr/knot_knot -- increase the tcp-io-timeout value under Valgrind

See merge request knot/knot-dns!1256

tests-extra/tests/ixfr/knot_knot/test.py

@@ -13,7 +13,7 @@ zones = t.zone_rnd(5, records=50) + t.zone("records.")
 t.link(zones, master, slave, ixfr=True)
 
 if master.valgrind:
-    master.tcp_io_timeout = 2000
+    master.tcp_io_timeout = 3000
     slave.tcp_remote_io_timeout = 8000
 
 t.start()