Changelog 2.4.3.1 hotfix

Bugfixes:

* fixed requirements on Strelky PTRD (1 per squad)
* fixed requirements on PPSh guns
* fixed Panzer Elite HQ missing on some maps
* put Men Against Tanks upgrade in Armoury

Gameplay:

* applied DP-28 pintle MG upgrade on SU 76 (50 ammo)
* lowered 52k AT/AA cannon penetration on medium/long range
* applied 25% lower rate of fire for 52k AT/AA gun on long range
* fixed upkeep on Sturmovie Ingenery

edit: known bugs:

* missing bomb models (blue boxes) on IL-2 bombing run
* Spotter retreats at lower speed when he was in cover during retreat order