Revert "Fixed deadlock in CRYPTO_THREAD_run_once for Windows"
This reverts commit 349d1cfd. The proposed fix is incorrect. It marks the "run_once" code as having finished before it has. The intended semantics of run_once is that no threads should proceed until the code has run exactly once. With this change the "second" thread will think the run_once code has already been run and will continue, even though it is still in progress. This could result in a crash or other incorrect behaviour. Reviewed-by: NTim Hudson <tjh@openssl.org>
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