Hide QObject::connect stateChanged warning.

pytest.ini

@@ -36,4 +36,3 @@ qt_log_ignore =
     ^QNetworkReplyImplPrivate::error: Internal problem, this method must only be called once\.
     ^QWaitCondition: Destroyed while threads are still waiting
     ^QXcbXSettings::QXcbXSettings\(QXcbScreen\*\) Failed to get selection owner for XSETTINGS_S atom
-    ^QObject::connect: Cannot connect \(null\)::stateChanged\(QNetworkSession::State\) to QNetworkReplyHttpImpl::_q_networkSessionStateChanged\(QNetworkSession::State\)

qutebrowser/utils/log.py

@@ -297,6 +297,11 @@ def qt_message_handler(msg_type, context, msg):
         'QXcbWindow: Unhandled client message: "_GTK_',
         # Happens on AppVeyor CI
         'SetProcessDpiAwareness failed:',
+        # https://bugreports.qt.io/browse/QTBUG-49174
+        'QObject::connect: Cannot connect (null)::stateChanged('
+            'QNetworkSession::State) to '
+            'QNetworkReplyHttpImpl::_q_networkSessionStateChanged('
+            'QNetworkSession::State)',
     ]
     if sys.platform == 'darwin':
         suppressed_msgs += [