Steps to reproduce:
1. Open user attached project
2. Load Assets/CharacterControllerScene.unity scene
3. Start Play mode
4. Translate the "Point" GameObject (color yellow)
5. Observe the new position of the "Result" GameObject does not follow along the surface of the capsule
6. Assign the "Capsule" GameObject's Capsule Collider to the "Collider" field of "Test Behaviour" and translate the "Point" GameObject
7. Notice that the red capsule follows along the surface right now

Expected behavior: CharacterController.ClosestPoint return points should be based on the collider's shape

Reproduced in: 2018.2.0a1, 2018.1.0b8, 2017.3.1p1, 2017.2.1p4, 2017.1.3p1

Fixed in: 2018.2.0a8, 2018.1.5f1, 2017.4.9f1