Only apply perimeter/infill overlap to the endpoints of rectilinear infill (and do that in a more proper way)

xs/xsp/Point.xsp

@@ -22,6 +22,10 @@
         %code{% RETVAL = THIS->x; %};
     long y()
         %code{% RETVAL = THIS->y; %};
+    void set_x(long val)
+        %code{% THIS->x = val; %};
+    void set_y(long val)
+        %code{% THIS->y = val; %};
     int nearest_point_index(Points points);
     Point* nearest_point(Points points)
         %code{% RETVAL = new Point(); THIS->nearest_point(points, RETVAL); %};