Prototype unit cap mechanic

core/src/mindustry/world/Block.java

@@ -106,6 +106,9 @@ public class Block extends UnlockableContent{
     public EnumSet<BlockFlag> flags = EnumSet.of();
     /** Targeting priority of this block, as seen by enemies.*/
     public TargetPriority priority = TargetPriority.base;
+    /** How much this block affects the unit cap by.
+     * The block flags must contain unitModifier in order for this to work. */
+    public int unitCapModifier = 0;
     /** Whether the block can be tapped and selected to configure. */
     public boolean configurable;
     /** Whether this block consumes touchDown events when tapped. */