Bump version

Change-Id: I7da486fc6640df27695971c70bbb50a842b9cca2
Fix QWebSocketServer for clients preferring lowercase http headers.

QWebSocketServer should not use case-sensitive compare to validate
http headers for incoming connections.

Change-Id: Ie7b8a9f6ca1a0b547eb7a924f6392395f812b0e3
Task-number: QTBUG-40615
Reviewed-by: Jędrzej Nowacki <jedrzej.nowacki@digia.com>
Merge remote-tracking branch 'origin/5.3' into 5.4

Conflicts:
	.qmake.conf

Change-Id: Ib38d0c86aa010b06b9a201115dfbc9f091abeb0e
Improve the integration of QtWebsockets into general Qt docs

1.) The websocket qml types page is now hooked into Qt's QML Type by Module
page.

2.) Correct incorrectly documented import statement for Qt.WebSockets
module in QML.

3.) Add missing \since tags (see QTBUG-36775).

Change-Id: I1321db70215fcd16cfbd77dd71a459244241d8a3
Reviewed-by: Jerome Pasion <jerome.pasion@digia.com>