// take this server down, return appropriate error.
		if opts.Maintenance {
			writeResponse(w, http.StatusPreconditionFailed, nil, mimeNone)
		} else {
			writeResponse(w, http.StatusServiceUnavailable, nil, mimeNone)
		}
		return
	}
	writeResponse(w, http.StatusOK, nil, mimeNone)
}

// ClusterReadCheckHandler returns if the server is ready for requests.

	}
	switch errCode {
	case ErrSTSInternalError, ErrSTSUpstreamError:
		stsLogIf(ctx, err, logger.ErrorKind)
	}
	encodedErrorResponse := encodeResponse(stsErrorResponse)
	writeResponse(w, stsErr.HTTPStatusCode, encodedErrorResponse, mimeXML)
}

// STSError structure
type STSError struct {
	Code           string
	Description    string
	HTTPStatusCode int
}