Message 248198 - Python tracker

Yeah, I think that makes the most sense to me as well. I tried to make a minimum-impact patch, but this feels cleaner.

If we remove the Content-Length header, the `limit` kwarg might occur at an odd place in the part itself, but that feels unavoidable if someone submits an incorrect Content-Length for the request itself.

I'll re-work the patch and make sure the tests I added still add value. Thanks!