gun_data - Response body
Response body.
This message informs the relevant process that the server sent a all or part of the body for the response to the original request.
A data message is always preceded by a response message.
The response body may be terminated either by a data
message with the flag fin set or by a
gun_trailers(3) message.
The pid of the Gun connection process.
Identifier of the stream for the original request.
Whether this message terminates the response.
All or part of the response body.
1.0: Message introduced.