Clarify RangeOption semantics
Clarify RangeOption semantics

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