- Fix Linux build (huge thanks to Aokromes for testing as always)

- Some work towards resolving the crash on shutdown by implementing a shutdown task

--HG--
branch : trunk

src/server/shared/Threading/Callback.h

@@ -76,8 +76,4 @@ class QueryCallback
         ParamType param;
 };
 
-/*! ACE_Future_Set to store a bunch of unique async queries with callbacks.
-    (ie name queries)
-*/
-typedef ACE_Future_Set<QueryResultFuture> QueryResultFutureSet;
 #endif