[3.6] bpo-33674: asyncio: Fix SSLProtocol race (GH-7175) #7188
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Fix a race condition in SSLProtocol.connection_made() of
asyncio.sslproto: start immediately the handshake instead of using
call_soon(). Previously, data_received() could be called before the
handshake started, causing the handshake to hang or fail.
(cherry picked from commit be00a55)
https://bugs.python.org/issue33674