gofakes3 kept the keys given with --auth-key in a store global to the process, so when more than one serve s3 was running in one rclone (eg started via the rc) each accepted the others' credentials and a client with the key for one server could read and write the backend of another. This updates gofakes3 to v0.0.9 which keeps auth keys per instance and adds a test that two servers only accept their own keys.