ADD: Forge cost for ways
- Cost of new ways is the sum of: (1) the price of the way itself; (2) the cost of the underlying land (if not already player owned); and (3) the forge cost.
- Cost of upgrading ways (of the same waytype) is only the price of the way itself
- The forge cost is reduced for laying parallel ways of the same type
- Set the forge cost in simuconf.tab with the forge_cost_[waytype]= setting (e.g.: forge_cost_road=20000, making the forge cost of road 200c/km)
- The price shown in the tooltip is the way price plus the forge cost
- Set the discount percentage for the parallel way in simuconf.tab with parallel_ways_forge_cost_percentage_[waytype] (e.g. parallel_ways_forge_cost_percentage_road = 50, making the forge cost of a parallel road 50% of that of a singly built road)
CHANGE: Bulldozing a way costs only half the cost of building it