code: def get_proxy_config(self, headers, path):
          
          self.ofs.conn.add_aws_auth_header(headers, 'PUT', path)
          from pprint import pprint
          pprint(headers)
          host = self.ofs.conn.server_name()
          return host, headers
docs: stub. this really needs to be a call to the remote
          restful interface to get the appropriate host and
          headers to use for this upload