more required parameters needed for signing
more required parameters needed for signing

allows s3cmd info s3://bucket/ to work

andrewgaul/s3proxy,kahing/s3proxy,andrewgaul/s3proxy,bouncestorage/s3proxy,timuralp/s3proxy,bouncestorage/s3proxy,flandr/s3proxy,flandr/s3proxy,kahing/s3proxy,timuralp/s3proxy