Merge topic 'FindGLUT-include-dirs' 6fda93faf8 FindGLUT: Provide modern-named GLUT_INCLUDE_DIRS result variable 641b3f4101 FindGLUT: Modernize documentation layout 924b2999a1 FindGLUT: Move mark_as_advanced calls closer to find calls Acked-by: Kitware Robot <kwrobot@kitware.com> Merge-request: !6820