Provide OPENSSL_INIT_NO_ATEXIT noop
The brilliant idea of installing a fragile non-idempotent cleanup atexit
handler as a library has bitten many people over time. This gets particularly
exciting when you can't control who dlopens the lib first (don't we all love
Python bindings) or if you are in a threaded context. Fake OpenSSL clones
chose not to do this but now get to carry a noop flag since people start
opting out of this madness (there's a good old tradition at work here).
ok beck joshua jsing millert miod