Do Not Merge +htp #16573 Multipart Form Data issue reproducer

Refs #16573
It might not be nice but this is modeled after how the original code with the problem looks. From looking at the APIs this looks reasonable. I get out the first element and the stream of the rest. I don't think that this is the issue though.

It works with 0.11, and it would be great to know why it doesn't with 1.0-M1.