- * @param offset offset of the result (modulo num-results);
- * specific ordering does not matter for the offset
- * @param key key to match, never NULL
- * @param vhash hash of the value, maybe NULL (to
- * match all values that have the right key).
- * Note that for DBlocks there is no difference
- * betwen key and vhash, but for other blocks
- * there may be!
+ * @param next_uid return the result with lowest uid >= next_uid
+ * @param random if true, return a random result instead of using next_uid
+ * @param key maybe NULL (to match all entries)