curl: Incomplete Suppression of Transfer-Encoding: chunked Header in HTTP/2 After Redirect From HTTP/1.1

When curl send a request with Transfer-Encoding: chunked using HTTP/1.1, and follows a redirect to an HTTP/2 endpoint, the uploadchunky flag is not properly reset. As a result, the Transfer-Encoding: chunked header is sent in the subsequent request even when HTTP/2 is negotiated/used. This violat...