tls: Destroy socket when encrypted side closes

lib/tls.js

@@ -1322,6 +1322,12 @@ function pipe(pair, socket) {
   pair.encrypted.pipe(socket);
   socket.pipe(pair.encrypted);
 
+  pair.encrypted.on('close', function() {
+    process.nextTick(function() {
+      socket.destroy();
+    });
+  });
+
   pair.fd = socket.fd;
   var cleartext = pair.cleartext;
   cleartext.socket = socket;