begin testing tcp listener (not working)

tcp/txqueue.go

@@ -50,6 +50,7 @@ type ringidx struct {
 // Reset resets the RingTx's internal state to use buf as the main ring buffer and creates or reuses
 // the packet ring buffer.
 func (rtx *ringTx) Reset(buf []byte, maxqueuedPackets int, seq Value) error {
+	buf = buf[:len(buf):len(buf)] // safely omit capacity section.
 	if maxqueuedPackets <= 0 {
 		return errors.New("queued packets <=0")
 	} else if len(buf) < minBufferSize || len(buf) < maxqueuedPackets {