Both QtWeSockets and QtHttpServer has a QSslServer class that is useful
elsewhere. They are different though, so the new class has features
from both versions.
[ChangeLog][QtNetwork] Unify QSslServer from QtWebSockets and QtHttpServer into QtNetwork
Task-number: QTBUG-100823
Change-Id: I523f04db39297ceb9b258f673eb12deecfc6886c
Reviewed-by: Mårten Nordheim <marten.nordheim@qt.io>
Reviewed-by: Qt CI Bot <qt_ci_bot@qt-project.org>