Comment 3 for bug 1747384

/v1/container/object is not a valid Swift URL for temporary URLs. (Pedantically, it *is* a valid url, but it refers to an account named "container" and a container named "object".) Temporary URLs must refer to a specific object or a set of objects with a common prefix. This requires the signed URL to be of the form `/v1/{acct}/{container}/{object or prefix}`.