db-upgrade-util 1:5.3.21~exp1ubuntu1 (amd64 binary) in ubuntu vivid

 This empty package depends on the old (from previous stable release)
 utilities package containing different tools for manipulating
 databases and installs unversioned links to current database
 utilities.
 .
 This package exists to help package maintainers which need to upgrade
 Berkeley DB database file. The package which needs to perform an
 database upgrade will need to depend on db-util and db-upgrade-util
 and call commands as described in:
 http://docs.oracle.com/cd/E17076_02/html/upgrading/upgrade_process.html