Another TODO update

git-svn-id: svn://bind10.isc.org/svn/bind10/branches/trac408@3718 e5f2f494-b856-4b98-b285-d166d9295462

src/lib/nsas/TODO

@@ -22,3 +22,4 @@ Long term:
   solution to use weak_ptr inside the hash_table instead of shared_ptr and
   catch the exception inside get() (and getOrAdd) and delete the dead pointer.
 * Selection algorithm
+* Use enable_shared_from_this.hpp instead of passing self everywhere