s3: ignore zero length directory markers - fixes #1621
s3: ignore zero length directory markers - fixes #1621

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