changed: added Cur structure

we have there two pointers: 
 Request * request;
 Session * session;
these are the current request and the current session


the session GC was moved to SessionManager (was in SessionContainer)



git-svn-id: svn://ttmath.org/publicrep/winix/trunk@708 e52654a7-88a9-db11-a3e9-0013d4bc506e

core/request.cpp

@@ -78,10 +78,6 @@ void Request::Clear()
 	env_content_type    = &char_empty;
 	env_http_accept_encoding = &char_empty;
 
-	temporary_session.Clear();
-	temporary_session.id = 0;
-	session = &temporary_session;
-	
 	item_tab.clear();
 	item.Clear();
 	dir_tab.clear();