#1938892: Switch from ISO-3166-1 country data to CLDR unicode data lead to the addition of some territories and a region, all of which don't represent countries. Specifically, the addition of:
- Diego Garcia
- Ceuta and Melilla
- Canary Islands
- Saint Martin
- Outlying Oceania
was rightly disputed in #1938892-43: Switch from ISO-3166-1 country data to CLDR unicode data.
So most urgently, we have to decide what to do with these specific territories, as these constitute a regression vs. D7 and therefore a critical bug.
Apart from that, we also have to figure out some criteria on which basis countries should be included or not. And we need to make sure these inclusion criteria are automatically enforced, whenever CLDR possibly decides to add another territory to the list.
This part is less critical, so might be spun off to a followup, or not.