http2session.encrypted
- 类型: <boolean> | <undefined>
如果 Http2Session 会话套接字尚未连接，则值为 undefined；如果 Http2Session 已通过 TLSSocket 连接，则值为 true；如果 Http2Session 连接到其他类型的套接字或流，则值为 false。
【Value is undefined if the Http2Session session socket has not yet been
connected, true if the Http2Session is connected with a TLSSocket,
and false if the Http2Session is connected to any other kind of socket
or stream.】