Missing quad_normals in documentation

[dark_sylinc]

I just noticed the manual doesn't even mention the "quad_normals camera_far_corners_view_space|camera_far_corners_world_space" parameter for Compositor render_quad passes; which are in render_quad passes to fill the normals with far clipping vectors from the frustum as a NORMAL attribute, and reconstruct camera-space in world unit positions from screen space positions and depth information