WIP: Fix broken QNAM::networkAccessible()
This change cherry-picks d80fde62ed82493322463d2057a07b6b2ed81a83 from Qt 5.10.
When switching on/off multiple time the wifi (mainly, but not only) on ios/macos the QNAM may wrongly stay on a NotAccessible state while the configuration is Active. This change make sure the QNAM::networkAccessible() is correctly reporting the accessibility. Task-number: QTBUG-49751 Task-number: QTBUG-58275 Task-number: QTBUG-60366 Change-Id: I238ab32030fbaa8072cce341db8da6bcfc346035 Reviewed-by: Timur Pocheptsov <email@example.com> Conflicts: src/network/access/qnetworkaccessmanager.cpp