Fail on HTTP codes >=400
Fail on HTTP codes >=400

(cherry picked from commit daa432113f01d19107fb6cfbdcb6b41701950e4d)

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