* types packages is imported more than onece * Fix error response when format of --expires is wrong. It MUST be in RFC 1123 date format.
see https://blog.aqwari.net/xml-schema-go/ 1. go get aqwari.net/xml/cmd/xsdgen 2. xsdgen -o s3api_xsd_generated.go -pkg s3api AmazonS3.xsd