Skipper:Skipper ignores upstreams whose param names end in "[]"

When i try to upload one file, everything is ok!
But when i upload multiples, skipper does not work! I think because the upload try to use array in their param, so skipper does not understand!

Here is the code:
HTML:

```

```

Sailsjs:

```
req.file('files').upload(function (err, uploadFiles) {
console.log(uploadFiles.length);
});
```

The log always give the 0 result

Start by reproducing the multipart upload shown in the issue, using an input named file[] and the req.file('files').upload entry point. Compare single-file and multiple-file behavior; done means uploads using array-style parameter names are recognized and uploadFiles reports the uploaded files.

Written by the indexing model from the issue text.