add form.multiples check

preserves backward compat

related to #380 #340

Author: tunnckoCore

lib/incoming_form.js

@@ -84,7 +84,7 @@ IncomingForm.prototype.parse = function(req, cb) {
     var fields = {}, files = {};
     this
       .on('field', function(name, value) {
-        if (name.slice(-2) === '[]') {
+        if (this.multiples && name.slice(-2) === '[]') {
           var realName = name.slice(0, name.length - 2);
           if (realName in fields) {
             if (!Array.isArray(fields[realName])) {