- added missing comma in nat-test

git-svn-id: https://gnunet.org/svn/gnunet@33647 140774ce-b5e7-0310-ab8b-a85725594a96
-doxygen

git-svn-id: https://gnunet.org/svn/gnunet@33648 140774ce-b5e7-0310-ab8b-a85725594a96
-trying to fix #3426

git-svn-id: https://gnunet.org/svn/gnunet@33649 140774ce-b5e7-0310-ab8b-a85725594a96