S3_0 alpha1 is going to be first ever alpha light-weight release of freeciv. For now this article is just notes about that release. At later date I hope to turn this in to proper document about alpha release process.
Ticket: Task #700704
Forum thread: S3_0 alpha1 testing
I originally hoped to have a new msys2 environment available for S3_0 alpha1, but unfortunately I have had no opportunity to make such a thing, nor do I expect to make it within next couple of weeks. I'm currently thinking that maybe alpha2 would be something to release after Windows build environments have been updated (new version of both msys2 and crosser).