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Calling SSL_peek can cause bytes to be read from the raw socket which in turn can upset the select machinery that determines whether there's data available on the socket. Since Curl_ossl_check_cxn only tries to determine whether the socket is alive and doesn't actually need to see the bytes SSL_peek seems like the wrong function to call. We're able to occasionally reproduce a connect timeout due to this bug. What happens is that Curl doesn't know to call SSL_connect again after the peek happens since data is buffered in the SSL buffer and thus select won't fire for this socket. Closes #795