HTTP: blacklist server for pipelining

that server was found out not to support HTTP pipelining.

tested manually; for more information see the task.

Change-Id: I9120e8be1a9a05f39f99752d6426c92fa3d093f2
(cherry picked from commit ec6d7694f72498d1b156bb0ae8d305e01931f7b2)
Reviewed-by: Markus Goetz
Task-number: QTBUG-21369
Reviewed-by: Thiago Macieira <thiago.macieira@intel.com>

src/network/access/qhttpnetworkconnectionchannel.cpp

@@ -731,6 +731,7 @@ void QHttpNetworkConnectionChannel::detectPipeliningSupport()
             && (!serverHeaderField.contains("Netscape-Enterprise/3."))
             // this is adpoted from the knowledge of the Nokia 7.x browser team (DEF143319)
             && (!serverHeaderField.contains("WebLogic"))
+            && (!serverHeaderField.startsWith("Rocket")) // a Python Web Server, see Web2py.com
             ) {
         pipeliningSupported = QHttpNetworkConnectionChannel::PipeliningProbablySupported;
     } else {