class Protocol::HTTP2::Connection

def accept_stream(stream_id, &block)

On the server side, we accept requests.
Accept an incoming stream from the other side of the connnection. 
def accept_stream(stream_id, &block)
	unless valid_remote_stream_id?(stream_id)
		raise ProtocolError, "Invalid stream id: #{stream_id}"
	end
	
	create_stream(stream_id, &block)
end