docs: improve --files-from documentation
docs: improve --files-from documentation

ncw/rclone,olihey/rclone,seuffert/rclone,yonjah/rclone,ncw/rclone,ncw/rclone,B4dM4n/rclone,B4dM4n/rclone,seuffert/rclone,B4dM4n/rclone,yonjah/rclone,seuffert/rclone,olihey/rclone,olihey/rclone,yonjah/rclone,yonjah/rclone,olihey/rclone,ncw/rclone,seuffert/rclone,B4dM4n/rclone