class Protocol::HTTP2::Connection

def send_goaway(error_code = 0, message = "")

Tell the remote end that the connection is being shut down. If the `error_code` is 0, this is a graceful shutdown. The other end of the connection should not make any new streams, but existing streams may be completed. 
def send_goaway(error_code = 0, message = "")
	frame = GoawayFrame.new
	frame.pack @remote_stream_id, error_code, message
	
	write_frame(frame)
ensure
	self.close!
end