message: Add self to a dbglog msg
diff: @@ -746,6 +746,7 @@ impl Connection {
  // TODO(agrover, mt) - need to analyze and fix #47
  // rather than just clamping to zero here.
  qdebug!(
  + [self],
  "delay duration {:?}",
  max(now, earliest).duration_since(now)
  );
  