Added experiment to avoid sending the termination signal

(cherry picked from commit c5357e1f000054ba5836468922cae52a830c8019)

proxy/vmess/inbound/inbound.go

@@ -207,7 +207,9 @@ func transferResponse(timer signal.ActivityUpdater, session *encoding.ServerSess
 		return err
 	}
 
-	if request.Option.Has(protocol.RequestOptionChunkStream) {
+	account := request.User.Account.(*vmess.MemoryAccount)
+
+	if request.Option.Has(protocol.RequestOptionChunkStream) && !account.NoTerminationSignal {
 		if err := bodyWriter.WriteMultiBuffer(buf.MultiBuffer{}); err != nil {
 			return err
 		}