Use the protocol version from the handshake

I used the protocol version from the record layer thinking I was using
the protocol version from the handshake. This commit fix this and uses
the protocol version from the handshake instead of from the record layer
as in https://gist.github.com/rcvalle/10335282, which is how it should
have been initially.

Thanks to @wvu-r7 for finding this out!