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/Maps/Map.cpp

@@ -504,6 +504,18 @@ void Map::VisitNearbyCellsOf(WorldObject* obj, TypeContainerVisitor<Trinity::Obj
 
 void Map::Update(const uint32 &t_diff)
 {
+    /// update worldsessions for existing players
+    for(m_mapRefIter = m_mapRefManager.begin(); m_mapRefIter != m_mapRefManager.end(); ++m_mapRefIter)
+    {
+        Player* plr = m_mapRefIter->getSource();
+        if(plr && plr->IsInWorld())
+        {
+            //plr->Update(t_diff);
+            WorldSession * pSession = plr->GetSession();
+            MapSessionFilter updater(pSession);
+            pSession->Update(t_diff, updater);
+        }
+    }
     /// update active cells around players and active objects
     resetMarkedCells();