Cycles-nodes implementation of a better glossy shader

[lsscpp]

@CarlG

Reflective BSDF to completely replace diffuse would mean having to deal with specular paths to handle global illumination. How does that work? For me, not at all even remotely In fact I even replace glossy components with diffuse as far as GI is concerned.

Wworks having a diffuse/glossy mix driven by roughness. So rougness 1 is actually using a diffuse shader