this change breaks POST, backing out for the moment

           ### we could probably just use brigade_partition() in here.

        */

        apr_brigade_partition(ctx->b, *readbytes, &e);

        b = apr_brigade_split(ctx->b, e);

        while (!APR_BRIGADE_EMPTY(ctx->b)) {

            const char *ignore;

            e = APR_BRIGADE_FIRST(ctx->b);

            if ((rv = apr_bucket_read(e, &ignore, &len, mode)) != APR_SUCCESS) {

                /* probably APR_IS_EAGAIN(rv); socket state isn't correct;

                 * remove log once we get this squared away */

                ap_log_error(APLOG_MARK, APLOG_ERR, rv, f->c->base_server, 

                             "apr_bucket_read");

                return rv;

            }

            if (len) {

                /* note: this can sometimes insert empty buckets into the

                 * brigade, or the data might come in a few characters at

                 * a time - don't assume that one call to apr_bucket_read()

                 * will return the full string.

                 */

                if (*readbytes < len) {

                    apr_bucket_split(e, *readbytes);

                    *readbytes = 0;

                }

                else {

                    *readbytes -= len;

                }

                APR_BUCKET_REMOVE(e);

                APR_BRIGADE_INSERT_TAIL(b, e);

                break; /* once we've gotten some data, deliver it to caller */

            }

            apr_bucket_delete(e);

        }

        /* ### this is a hack. it is saying, "if we have read everything

           ### that was requested, then we are at the end of the request."