c1c161d1b8
iOS Seafile Pro 4.0.2 negotiates resumable uploads via Upload-Draft-Interop-Version: 6, but Seafile-fileserver does not understand the protocol and never returns the expected interim response; the iOS client then cancels the HTTP/2 stream after ~60s and the upload (or library-create POST) appears to fail. Strip the negotiation headers so the client falls back to normal multipart upload, and bump upstream timeouts for large transfers.