Add RSASS, MSR, XM2010

- Add RSASS, MSR, XM2010 normal, SD, NV and TWS versions
- SD versions have a slightly slower bullet speed as the non sd versions. Server Admins have to be careful with adding the SD versions to not hurt the server balance.
- Remove old AS50 ammo config, it is not needed any longer, also switch to the correct AS50 magazine classname.

Thx @AlwarrenSidh for the weapons.

SQF/dayz_code/Configs/CfgMagazines/Magazines/762x67.hpp

@@ -0,0 +1,19 @@
+class 5Rnd_762x67_XM2010: CA_Magazine
+{
+	scope = public;
+	displayName = $STR_DZ_MAG_5RND_XM2010_NAME;
+	descriptionShort = $STR_DZ_MAG_5RND_XM2010_DESC;
+	count = 5;
+	ammo = "Rem_300Win_Ball";	
+	initSpeed = 850;	
+	picture = "\FHQ_Remington\ammo\ui\i_xm2010.paa";
+	model = "\FHQ_Remington\XM2010\magazine.p3d";
+};
+
+class 5Rnd_762x67_XM2010_SD: 5Rnd_762x67_XM2010
+{
+	initSpeed = 750;
+	displayName = $STR_DZ_MAG_5RND_XM2010SD_NAME;
+	descriptionShort = $STR_DZ_MAG_5RND_XM2010SD_DESC;
+	ammo = "Rem_300Win_SD";
+};