Compile fix without proxy support

This is required for for the autotests to compile.

Change-Id: I8cd1ad11ca5d28e2d1ade06649cf6c2e1eee9a2c
Reviewed-by: Oliver Wolff <oliver.wolff@digia.com>
(cherry picked from commit aef4cba4ce5f3acfa6765c71283d9363dffe97b7)
Make QWebSocketPrivate::makeConnections() take care of all connections.

Otherwise all code that calls it has to handle the other connections
separately, which is error-prone and has actually been forgotten for the
case where the QWebSocket is created via upgradeFrom().

Task-number: QTBUG-39551
Change-Id: I4d1e4faa1594b53e7a8dccc9ce13ef2c323b1c61
Reviewed-by: Kurt Pattyn <pattyn.kurt@gmail.com>
Fix invalid Date header field in handshake response

Fix invalid Date header in handshake response on systems with non-
english system locale.

Task-number: QTBUG-40866
Change-Id: If6d5cc55e879eff259698e87c9cda753990245e7
Reviewed-by: Kurt Pattyn <pattyn.kurt@gmail.com>
Merge remote-tracking branch 'origin/5.3' into 5.4.0

Change-Id: Iae18d5786396e50244c59773b3b0289347e3ef45