Here's a short overview about the changes found in version 3.1.9:

* Type __package_emerge: Fix handling of slotted packages (Daniel Heule)
* Type __package_apt: Use --force-confdef (Ricardo Catalinas Jiménez)
* Type __package_update_index: Decrease verbosity (Ricardo Catalinas Jiménez)
* Type __package_upgrade_all: Decrease verbosity (Ricardo Catalinas Jiménez)

For more information visit the cdist homepage.