Map local guids 6.x -> 4.3.4

Ported the following commits:
https://github.com/TrinityCore/TrinityCore/commit/ca83e14f8b141fab0a13e08f48fca6c1ace0c4c7
https://github.com/TrinityCore/TrinityCore/commit/ee1c1b97be4492ecabe8b15ea6323fc37e4eaa8c
https://github.com/TrinityCore/TrinityCore/commit/18e4ab6911468b829b0fc768e532a770263c3717
https://github.com/TrinityCore/TrinityCore/commit/bf37446b3c2ed73b4d3aa9e227d3eff5c53b378b
https://github.com/TrinityCore/TrinityCore/commit/cb854a2b7bb7bd96cf9c4d1daf3789f797bf4db8

src/server/worldserver/Main.cpp

@@ -264,10 +264,10 @@ extern int main(int argc, char** argv)
     sWorldSocketMgr.StopNetwork();
 
     sInstanceSaveMgr->Unload();
+    sOutdoorPvPMgr->Die();
     sMapMgr->UnloadAll();                     // unload all grids (including locked in memory)
     sObjectAccessor->UnloadAll();             // unload 'i_player2corpse' storage and remove from world
     sScriptMgr->Unload();
-    sOutdoorPvPMgr->Die();
 
     // set server offline
     LoginDatabase.DirectPExecute("UPDATE realmlist SET flag = flag | %u WHERE id = '%d'", REALM_FLAG_OFFLINE, realmHandle.Index);