Dirclean: delete oldest files until dir size is less than threshold

[Ajki]

rclone can’t open files for read and write together, and it can’t seek in write only files. To fix that, rclone would have to buffer files locally which it may one day.

Any chance until that day for rclone not to do any changes eg not delete the file, but just give error Rclone mount crypt (amazon drive) filed destroyed on edit/save