-doxygen, code cleanup

git-svn-id: https://gnunet.org/svn/gnunet@33489 140774ce-b5e7-0310-ab8b-a85725594a96
keep exit process running even if it cannot work to avoid ARM restarts

git-svn-id: https://gnunet.org/svn/gnunet@33490 140774ce-b5e7-0310-ab8b-a85725594a96