net: use `_final` instead of `on('finish')`
Shutting down the connection is what `_final` is there for.

Shutting down the connection is what `_final` is there for.
[squash] nit
nodejs · addaleax · addaleax · addaleax · Feb 7, 2018 · nodejs-github-bot
diff --git a/lib/net.js b/lib/net.js
  return self._handle.shutdown(req);
 }

 // the user has called .end(), and all the bytes have been
 // sent out to the other side.
-function onSocketFinish() {
+Socket.prototype._final = function(cb) {
  // If still connecting - defer handling 'finish' until 'connect' will happen
diff --git a/lib/internal/streams/destroy.js b/lib/internal/streams/destroy.js
@@ -55,6 +55,8 @@ function undestroy() {
    this._writableState.destroyed = false;
    this._writableState.ended = false;
    this._writableState.ending = false;
+    this._writableState.finalCalled = false;
+    this._writableState.prefinished = false;