Connection object for buffer_event
	# Create a new `Connection` object for `buffer_event`
	fun spawn_connection(buffer_event: NativeBufferEvent, address: String): Connection
	do
		return new Connection(buffer_event)
	end
					lib/libevent/libevent.nit:508,2--512,4
				
	redef fun spawn_connection(buf, address)
	do
		return new EchoConnection(buf)
	end
					lib/libevent/libevent_example.nit:24,2--27,4
				
	redef fun spawn_connection(buf, address)
	do
		print "[Server] New client: {address}"
		var conn = new TestConnection(buf)
		print "[Server] Write: Hi"
		conn.write "Hi\n"
		return conn
	end
					lib/libevent/libevent_test.nit:36,2--44,4
				
	redef fun spawn_connection(buf_ev, address) do return new HttpServer(buf_ev, self, address)
					lib/nitcorn/reactor.nit:137,2--92