(Only for discussion) +str #15402 SSL support for streams (working for happy case)

This is only mean for discussing naming and getting some feedback on the code so far
That was intentional, since we want to call `wrap` when the remote side can read, and if we get something useful we go to the `handshakeWritePhase` that sends it. But now looking at it, they can probably be collapsed, and I think that the cpherbytes check in the unwrap phase is wrong.