Core: Add wintergrasp-patch to wintergrasp_cleanup branch - resurrected from an old work-repository, now over as a branch to work on.

Original patch by socolin, cand a ton of contributors :
mathman, joda, spp, silinoron, josh, malcrom, shauren, machiavelli, click, rat, leak, tobmaps, _manuel_, the tcfr team (via socolin), and tons of others for chiming in.

NOTE: THIS IS A WORKING-BRANCH, AND _NOT_ MENT FOR PUBLIC USE OR EVEN CONSIDERED STABLE!

src/server/game/Entities/Unit/Unit.cpp

@@ -54,7 +54,7 @@
 #include "Vehicle.h"
 #include "Transport.h"
 #include "InstanceScript.h"
-
+#include "BattlefieldMgr.h"
 #include <math.h>
 
 float baseMoveSpeed[MAX_MOVE_TYPE] =
@@ -15487,9 +15487,14 @@ void Unit::Kill(Unit* victim, bool durabilityLoss)
     // outdoor pvp things, do these after setting the death state, else the player activity notify won't work... doh...
     // handle player kill only if not suicide (spirit of redemption for example)
     if (player && this != victim)
+    {
         if (OutdoorPvP* pvp = player->GetOutdoorPvP())
             pvp->HandleKill(player, victim);
 
+        if (Battlefield* bf = sBattlefieldMgr.GetBattlefieldToZoneId(player->GetZoneId()))
+            bf->HandleKill(player, victim);
+    }
+
     //if (pVictim->GetTypeId() == TYPEID_PLAYER)
     //    if (OutdoorPvP* pvp = pVictim->ToPlayer()->GetOutdoorPvP())
     //        pvp->HandlePlayerActivityChangedpVictim->ToPlayer();