If remote:path points to a file make NewFs return a sentinel error
fs.ErrorIsFile and an Fs which points to the parent.
Use this to remove the LimitedFs and just add this file to the
--files-from list.
This means that server side operations can be used also.
Fixes#518Fixes#545
This will allow setting up a remote with copy&paste of values to a headless machine. It will allow copy+pasting a token into the configuration.
This requires rclone to be on a machine with a proper browser. Custom client id and secrets are supported.
To test token generation, use `rclone auth "fs type"`.