Properly handle single protocol TLS configurations. Previously,
due to the use of generic (non version-specific) client/server method
they worked as ranges of protocols instead. This also fixes a couple
of previously broken tests.
Task-number: QTBUG-67584
Change-Id: Ied23113a4fab6b407a34c953e3bd33eab153bb67
Reviewed-by: Mårten Nordheim <marten.nordheim@qt.io>
Reviewed-by: Edward Welbourne <edward.welbourne@qt.io>
e3cea2a7b9