I'm having trouble getting the chunked file uploads to work (introduced in D12053). Specifically, I'm getting `413 Request Entity Too Large` both when using `/file/upload/` and `arc upload`. I have also setup the following:
- Set the `client_max_body_size` for nginx to `32M`
- Set the `post_max_size` for PHP to `32M`.
- Set the `upload_max_filesize` for PHP to `32M`.