What is the difference between the "updates" and "security" repos?
I'm asking because I want to set up and use unattended-upgrades, which only allow updates from "focal" and "focal-security" on Ubuntu 20.04
If I want "focal-updates" as well I have to enable that.
Are there packages that end up only in "updates" or do they automatically get a release on "security" if there is an actual security upgrade for the specific package?
Do I want to add "updates" in general, even in a server setup? Or leave it off, as is the default?