mysql_cb and pgsql_cb typo in createOptionAuditDHCP6
SELECT dhcp6_pd_pool.subnet_id INTO sid FROM dhcp6_pd_pool WHERE id = pool_id;
UPDATE dhcp6_subnet SET modification_ts = p_modification_ts
WHERE subnet_id = sid;
vs
SELECT dhcp6_pd_pool.subnet_id INTO sid FROM dhcp6_pd_pool WHERE id = pd_pool_id;
UPDATE dhcp6_subnet SET modification_ts = p_modification_ts
WHERE subnet_id = sid;
notice pool_id
vs pd_pool_id