[krnwkhsm] Soccer goal width lines

To the soccer field, add two lines perpendicular to the goal line, starting at the goal posts.  This would be helpful to goalkeepers for knowing the width and position of the goal they are defending, which is typically behind them.

We could also add more lines emanating from the goal posts at different angles.  These would make it further easier to judge whether a ball is on trajectory to go into the goal.