Internal refactoring & cleanup

core/src/mindustry/entities/bullet/RailBulletType.java

@@ -4,6 +4,12 @@ import mindustry.content.*;
 import mindustry.entities.*;
 import mindustry.gen.*;
 
+//TODO this class is bad for multiple reasons, remove/replace it.
+//- effects unreliable
+//- not really hitscan but works like it
+//- buggy trails
+//- looks bad
+//- generally unreliable
 public class RailBulletType extends BulletType{
     public Effect pierceEffect = Fx.hitBulletSmall, updateEffect = Fx.none;
     /** Multiplier of damage decreased per health pierced. */