We use global object to store errors found by q_X509Callback.
Thus, we also use a lock/mutex. It would appear all tests
involving in-process server and QNAM are prone to intermittent
failures on our Windows VMs - it's always about timeouts due
to the client socket (QNAM) locking and the server socket blocking
main thread while trying to acquire the same lock.
The real fix is to get rid of global variable/locking, we'll
have it later (quite a change and requires a lot of accuracy).
Task-number: QTBUG-76247
Change-Id: Iffc90d9e16783f17f62e836e01c35f22681bdd39
Reviewed-by: Timur Pocheptsov <timur.pocheptsov@qt.io>
91ab70d17f