Core: Add new system for parallelizing client packet processing. Handle WorldSession updates in Map::Update() where we are safe to proceed. Patch by Ambal.

(And clean up tabs and whitespace while rummaging around in there)
Closes issue 5084.

--HG--
branch : trunk

src/server/game/World/World.cpp

@@ -1175,7 +1175,7 @@ void World::LoadConfigSettings(bool reload)
 
     // Dungeon finder
     m_bool_configs[CONFIG_DUNGEON_FINDER_ENABLE] = sConfig.GetBoolDefault("DungeonFinder.Enable", false);
-    
+
     // DBC_ItemAttributes
     m_bool_configs[CONFIG_DBC_ENFORCE_ITEM_ATTRIBUTES] = sConfig.GetBoolDefault("DBC.EnforceItemAttributes", true);
 
@@ -2510,12 +2510,17 @@ void World::UpdateSessions(uint32 diff)
         ++next;
 
         ///- and remove not active sessions from the list
-        if (!itr->second->Update(diff))                      // As interval = 0
+        WorldSession * pSession = itr->second;
+        WorldSessionFilter updater(pSession);
+
+        if(!pSession->Update(diff, updater))    // As interval = 0
         {
             if (!RemoveQueuedPlayer(itr->second) && itr->second && getIntConfig(CONFIG_INTERVAL_DISCONNECT_TOLERANCE))
                 m_disconnects[itr->second->GetAccountId()] = time(NULL);
-            delete itr->second;
+            RemoveQueuedPlayer(pSession);
             m_sessions.erase(itr);
+            delete pSession;
+
         }
     }
 }