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Found with Ceph s3-tests.  References #5.

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