September 24th Hotfix

Fixed some problematic harvester behavior
Implemented 10% build time reduction for Turkey
Neutral structures are capturable in multiplayer again (except for STRUCT_V01)
Other misc. fixes

TIBERIANDAWN/UNIT.H

@@ -84,8 +84,7 @@ class UnitClass :	public TarComClass
 		bool  Harvesting(void);
 		void  APC_Close_Door(void);
 		void  APC_Open_Door(void);
-		BuildingClass*  Tiberium_Unload_Refinery(void) const {return TiberiumUnloadRefinery;}
-		BuildingClass*  Find_Best_Refinery(void) const;
+		virtual BuildingClass*  Find_Best_Refinery(void) const;
 
 		/*
 		**	Query functions.
@@ -158,6 +157,7 @@ class UnitClass :	public TarComClass
 		virtual int Mission_Guard(void);
 		virtual int Mission_Harvest(void);
 		virtual int Mission_Hunt(void);
+		virtual int Mission_Enter(void);
 		virtual int UnitClass::Mission_Move(void);
 		virtual FireErrorType Can_Fire(TARGET, int which) const;
 
@@ -204,7 +204,7 @@ class UnitClass :	public TarComClass
 		/*
 		**	This is the refinery a harvester is interested in unloading at.
 		*/
-		BuildingClass* TiberiumUnloadRefinery;
+		mutable BuildingClass* TiberiumUnloadRefinery;
 
 		/*
 		** Some additional padding in case we need to add data to the class and maintain backwards compatibility for save/load