should be an addition of VERSION_CODENAME in yakkety rather than a straight replace. snapd, for instance, consumes UBUNTU_CODENAME, since it's the only field in /etc/os-release with this information currently....
should be an addition of VERSION_CODENAME in yakkety rather than a straight replace. snapd, for instance, consumes UBUNTU_CODENAME, since it's the only field in /etc/os-release with this information currently....