Fixes #5054 by removing chinook's turn before landing and increasing ascend/descend speed

Allows for any helicopter to enable or disable the turn before landing
but sets it to default off for the chinook.  (may be desireable for
single player missions visual effect like Allies01?)  Also gives the
chinook a faster ascend/descend speed.  Fixes #5054

OpenRA.Mods.RA/Air/Helicopter.cs

@@ -19,8 +19,15 @@ namespace OpenRA.Mods.RA.Air
 	class HelicopterInfo : AircraftInfo, IMoveInfo
 	{
 		public readonly WRange IdealSeparation = new WRange(1706);
+
+		[Desc("Allow the helicopter land after it has no more commands.")]
 		public readonly bool LandWhenIdle = true;
+
+		[Desc("Allow the helicopter turn before landing.")]
+		public readonly bool TurnToLand = false;
 		public readonly WRange LandAltitude = WRange.Zero;
+
+		[Desc("How fast the helicopter ascends or descends.")]
 		public readonly WRange AltitudeVelocity = new WRange(43);
 
 		public override object Create(ActorInitializer init) { return new Helicopter(init, this); }
@@ -59,7 +66,9 @@ namespace OpenRA.Mods.RA.Air
 
 				if (Info.LandWhenIdle)
 				{
+					if (Info.TurnToLand)
 						self.QueueActivity(new Turn(Info.InitialFacing));
+
 					self.QueueActivity(new HeliLand(true));
 				}
 			}
@@ -103,7 +112,9 @@ namespace OpenRA.Mods.RA.Air
 
 				if (Info.LandWhenIdle)
 				{
+					if (Info.TurnToLand)
 						self.QueueActivity(new Turn(Info.InitialFacing));
+
 					self.QueueActivity(new HeliLand(true));
 				}
 			}

mods/cnc/rules/aircraft.yaml

@@ -17,6 +17,7 @@ TRAN:
 		Speed: 140
 		InitialFacing: 0
 		LandableTerrainTypes: Clear,Rough,Road,Ore,Beach,Tiberium,BlueTiberium
+		AltitudeVelocity: 0c100
 	Health:
 		HP: 90
 	Armor:

mods/ra/rules/aircraft.yaml

@@ -206,6 +206,7 @@ TRAN:
 		ROT: 5
 		Speed: 112
 		LandableTerrainTypes: Clear,Rough,Road,Ore,Beach
+		AltitudeVelocity: 0c100
 	RenderUnit:
 	WithRotor@PRIMARY:
 		Offset: -597,0,341