more verbs

Needs:

```sql
ALTER TABLE paste ADD uuid BINARY(16) NOT NULL AFTER id;
ALTER TABLE paste ADD UNIQUE (uuid);

DELIMITER @@

DROP PROCEDURE IF EXISTS insert_paste@@
CREATE PROCEDURE insert_paste (
  p_uuid BINARY(16),
  p_content MEDIUMBLOB,
  p_raw BIT(1),
  OUT p_id MEDIUMINT
)
BEGIN
  START TRANSACTION;
  INSERT paste (uuid, digest, content, raw)
  VALUES (p_uuid, UNHEX(SHA1(p_content)), p_content, p_raw);
  SELECT last_insert_id() INTO p_id;
  COMMIT;
END;
@@

DROP PROCEDURE IF EXISTS delete_paste@@
CREATE PROCEDURE delete_paste (
  p_uuid BINARY(16),
  OUT p_count MEDIUMINT
)
BEGIN
  START TRANSACTION;
  DELETE
  FROM paste
  WHERE uuid = p_uuid;
  SELECT row_count() INTO p_count;
  COMMIT;
END;
@@

DROP PROCEDURE IF EXISTS put_paste@@
CREATE PROCEDURE put_paste (
  p_uuid BINARY(16),
  p_content MEDIUMBLOB,
  OUT p_count MEDIUMINT
)
BEGIN
  START TRANSACTION;
  UPDATE paste
  SET digest = UNHEX(SHA1(p_content)), content = p_content
  WHERE uuid = p_uuid;
  SELECT row_count() INTO p_count;
  COMMIT;
END;
@@
```