[Freeciv-Dev] 'true' civil war nations

[Daniel Markstedt <himasaram@xxxxxxxx>]

We have the Confederate States and Soviet ready and more can be made 
easily, but as discussed elsewhere we don't want them to be available 
from start (with the default rules).
What about setting civil war-only nations to 'is_playable = 0'? Or has 
that any unwanted effects?
-Daniel