QSslCertificate::operator == - cleanup error queue
Another case when an OpenSSL's call can dump some errors into the shared error queue discovered. An invalid certificate with non-null X509 * may result in several errors appended to the queue.
https://codereview.qt-project.org/c/qt/qtbase/+/327307
Pick-to: 6.0 5.15 Change-Id: I1278b371bd1edf2d656760c371bfb6da5dcab6ec Reviewed-by: Mårten Nordheim marten.nordheim@qt.io (cherry picked from commit 3bc398f7)