Move dze_supplyCrate and vein wrecks to CfgLoot (#1863)

* Move dze_supplyCrate and vein wrecks to CfgLoot

Moves both the supply crates and vein wrecks to the CfgLoot tables so
admins can customize.
Also modifies the main add item statement to allow support for weapons,
magazines and backpack refunding/spawning instead of hard coded
magazines.

Should be backwards compatible with the old style (I did test).

* Remove unused _activatingPlayer variable

* Rework

SQF/dayz_code/Configs/CfgLoot/Groups/Wrecks.hpp

@@ -0,0 +1,29 @@
+Land_iron_vein_wreck[] =
+{
+	{Loot_MAGAZINE,85,PartOre,10,10},
+	{Loot_MAGAZINE,10,PartOreSilver,0,10},
+	{Loot_MAGAZINE,5,PartOreGold,0,5}
+};
+
+Land_silver_vein_wreck[] =
+{
+	{Loot_MAGAZINE,80,PartOreSilver,10,10},
+	{Loot_MAGAZINE,15,PartOreGold,2,6},
+	{Loot_MAGAZINE,5,PartOre,0,1}
+};
+
+Land_gold_vein_wreck[] =
+{
+	{Loot_MAGAZINE,80,PartOreGold,10,10},
+	{Loot_MAGAZINE,15,PartOreSilver,2,6},
+	{Loot_MAGAZINE,5,PartOre,0,1}
+};
+
+Land_ammo_supply_wreck[] =
+{
+	{Loot_MAGAZINE,		20,		2000Rnd_762x51_M134},
+	{Loot_MAGAZINE,		20,		29Rnd_30mm_AGS30},
+	{Loot_MAGAZINE,		20,		50Rnd_127x107_DSHKM},
+	{Loot_MAGAZINE,		20,		48Rnd_40mm_MK19},
+	{Loot_MAGAZINE,		20,		100Rnd_127x99_M2}
+};