CL = Content-Length
The uploadByteDevice was kept after a redirect which caused the
internals to assume that we had to upload the data. Even if this was
not the case we still transmitted the Content-Length header from the
first request which was now stored in two places.
Fixes: QTBUG-84162
Pick-to: 5.15
Change-Id: Ic86b1ef0766ffcc50beeed96c1c915b721d40209
Reviewed-by: Timur Pocheptsov <timur.pocheptsov@qt.io>
306ebe03ea