Look at the full big fat cross in the settler AI logic

[TomWerner]

The relevant TODO: https://github.com/C7-Game/Prototype/blob/8b7643a1641ac43ca25ec0d6b1efc09df16c4d78/C7Engine/AI/UnitAI/SettlerLocationAI.cs#L48

This is done mostly correctly in the map generation logic, where there's a TODO to unify the logic.