Use same event fin packets.

lib/util/forwardutil.js

@@ -48,7 +48,7 @@ ForwardParser.prototype._transform = function(chunk, encoding, done) {
 
       if (this._needLength === 0) {
         // This is a fin packet
-        this.emit('fin', this._target)
+        this.emit('packet', this._target, null)
         this._needLength = -HEADER_SIZE
       }
     }