
buckets
=======
- support bucket custom ACL query or edit (?acl query param)


objects
=======
- support object custom ACL query or edit (?acl query param)

  headers
  -------
  - x-amz-date, an alternative to the Date header.  Can replace Date
    in authentication strings, for example.

  - Content-Encoding: need transformation, or (as currently) store as-sent?
  - Content-MD5 (note: base64-encoded, not just hex string)

  byte range-related headers...
  - Range
  - Content-Range


system
======
- request logging, to a specified bucket)


