xrRender: Actor shadow reworked

Слиты xottab-duty запросил слияние github/fork/ShokerStlk/pr_xd_dev_9_actor_shadow в xd_dev

Created by: ShokerStlk

  • Restored shadow for R2
  • Shadow from any light source
  • Bringed back console command (R1 included)
  • Added frustum \ sector check

Almost zero FPS drop