s3: Add an option to disable checksum uploading - fixes #2213
s3: Add an option to disable checksum uploading - fixes #2213

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