Content type not set reasonably

It seems that when you upload even a file named something.txt, it gets an octet-stream content type on S3, so even if you click the view link in Classic UI on the artifacts page, your browser gets a downloaded file rather than displaying inline. Must be some way to tell jClouds/S3 to sniff content type automatically. OTOH there may be some dangerous types which we would want to serve only as plain text or binary.