Send several requests at a time when uploading

[hf02]

As of right now, it waits for every request to finish before going onto the next one. That's not the best because the majority of the waiting is from Neocities taking a bit after the files were uploaded.

I wonder if this is even possible. Neocities already 500s if you give it too many files at a time, despite what the documentation says. Thus, maybe sending multiple requests at a time will also just cause it to 500?