What?
A flag to mark a mod version asWhy?
When making new mods it's often required to test-play the mod with some actual people, or maybe ask some friends to use your mod during their regular play and tell you if they finds any bugs. Instead of setting up a private ftp and telling them to regularly look for new versions (or worse manual solutions) it would be much easier if you could[Edit 2020-09: Updated thread title, rephrased to stable/experimental terminology.]