Fixed: Fail on HTTP codes >=400
Fixed: Fail on HTTP codes >=400

(cherry picked from commit f82351346bcf153f3cbc5366aa1b5f65f24ceb65)

uroni/urbackup_backend,uroni/urbackup_backend,uroni/urbackup_backend,uroni/urbackup_backend,uroni/urbackup_backend,uroni/urbackup_backend,uroni/urbackup_backend