fs: clarify behaviour of Put() and Upload() for unknown-sized objects
fs: clarify behaviour of Put() and Upload() for unknown-sized objects

B4dM4n/rclone,ncw/rclone,ncw/rclone,B4dM4n/rclone,ncw/rclone,B4dM4n/rclone,B4dM4n/rclone,olihey/rclone,olihey/rclone,olihey/rclone,olihey/rclone,ncw/rclone