* minor: add to the thread tracker the thread with which the thread tracker tracks threads

OpenSim/Framework/ThreadTracker.cs

@@ -47,6 +47,7 @@ namespace OpenSim.Framework
             ThreadTrackerThread.IsBackground = true;
             ThreadTrackerThread.Priority = ThreadPriority.BelowNormal;
             ThreadTrackerThread.Start();
+            Add(ThreadTrackerThread);
 #endif
         }
 
@@ -133,4 +134,4 @@ namespace OpenSim.Framework
 
         #endregion
     }
-}
+}