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There are two new options to turn off or on TLS 1.1 and TLS 1.2. By default TLS 1.2 is off (value of 0), for now, because of a problem with TLS 1.2 crashing in openssl 1.0.1a and 1.0.1e. There is an open issue with openssl http://rt.openssl.org/Ticket/Display.html?id=3200.
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