Special case turn 0 for recruitment.

We want there to be units on the front line on turn 1 regardless of
factory locations, so bypass the recruitment restrictions on turn 0.

https://github.com/Khopa/dcs_liberation/issues/986

game/event/event.py

@@ -540,6 +540,12 @@ class UnitsDeliveryEvent:
             )
 
     def find_ground_unit_source(self, game: Game) -> Optional[ControlPoint]:
+        # This is running *after* the turn counter has been incremented, so this is the
+        # reaction to turn 0. On turn zero we allow units to be recruited anywhere for
+        # delivery on turn 1 so that turn 1 always starts with units on the front line.
+        if game.turn == 1:
+            return self.destination
+
         # Fast path if the destination is a valid source.
         if self.destination.can_recruit_ground_units(game):
             return self.destination

game/theater/controlpoint.py

@@ -329,6 +329,11 @@ class ControlPoint(MissionTarget, ABC):
         if not game.settings.enable_new_ground_unit_recruitment:
             return True
 
+        if game.turn == 0:
+            # Allow units to be recruited anywhere on turn 0 to avoid long delays to get
+            # everyone to the front line.
+            return True
+
         return self.has_factory
 
     def has_ground_unit_source(self, game: Game) -> bool: