QtBase_5.4_Integration #465: SUCCESS Tested changes (refs/builds/5.4_1413104187): http://codereview.qt-project.org/96756 [PS2] - prevent if_nametoindex being called with empty string http://codereview.qt-project.org/95605 [PS2] - QSettings: undo unintentional change of config dir on non-XDG platforms.