Move start of handshakeTimer to handleConnection


The problem of stucked connection was still a problem
for users of QWebSocketServer::handleConnection.

This amends 2e54dbe86eac61e87782a138dbcc158cb6b10cd9.

Pick-to: 6.11 6.10 6.8 6.5
Task-number: QTBUG-63312
Task-number: QTBUG-57026
Change-Id: If7662508886eea2c31393804360b9344e5b22144
Reviewed-by: Mårten Nordheim <marten.nordheim@qt.io>
commitfa0cb177706e3d9b7510728d5bf4308d677b128c
parent1e0fe3ca1d96745a09e37bd7049b6e43af81ab8f
authorAndré Klitzing <aklitzing@gmail.com>
committerAndré Klitzing <aklitzing@gmail.com>
commit timeThu, 12 Mar 2026 16:53:52 +0100