Add support for TCP port reuse (same tuple6 but different ISN) in session manager: evict old session and create new session

src/stellar/stellar.cpp

@@ -152,7 +152,7 @@ static void *work_thread(void *arg)
                 }
             }
 
-            sess = session_manager_lookup_session(sess_mgr, pkt);
+            sess = session_manager_lookup_session(sess_mgr, pkt, now);
             if (sess == NULL)
             {
                 sess = session_manager_new_session(sess_mgr, pkt, now);