[
{ type: upgrade
  maximum_version: 1.4
  message: <<EOM
If you're upgrading from earlier release to 1.4.x, please read UPGRADE
document, which is installed in docs folder, or check it online:

http://www.inet.no/dante/doc/1.4.x/config/upgrade.html

The 1.4.x release has syntax changes and various new functionality
additions.
EOM
}
]