This file is here to allow devs to easily add stuff in the release notes for the next release, it allows easy syncing with the release team, since you don't have to be around when the release takes place... Just dump whatever you want to have mentioned in the release notes here. The release team should empty this file after each release. The description key in [unit] should be unique, this key is used to avoid the recall duplication bug, which have been around for a while.