http2session.goaway([code[, lastStreamID[, opaqueData]]])

• code <number> HTTP/2 错误代码
• lastStreamID <number> 最后处理的 Http2Stream 的数字 ID
• opaqueData <Buffer> | <TypedArray> | <DataView> TypedArray 或 DataView 实例，包含要在 GOAWAY 帧中携带的附加数据。

将 GOAWAY 帧传输到连接的对等方_而不_关闭 Http2Session。

• code <number> An HTTP/2 error code
• lastStreamID <number> The numeric ID of the last processed Http2Stream
• opaqueData <Buffer> | <TypedArray> | <DataView> A TypedArray or DataView instance containing additional data to be carried within the GOAWAY frame.

Transmits a GOAWAY frame to the connected peer without shutting down the Http2Session.