fail to start service if we have a malformed configuration


git-svn-id: https://gnunet.org/svn/gnunet@31305 140774ce-b5e7-0310-ab8b-a85725594a96
do not start with malformed configuration


git-svn-id: https://gnunet.org/svn/gnunet@31306 140774ce-b5e7-0310-ab8b-a85725594a96
- fix #3203


git-svn-id: https://gnunet.org/svn/gnunet@31307 140774ce-b5e7-0310-ab8b-a85725594a96
-fix NPE

git-svn-id: https://gnunet.org/svn/gnunet@31308 140774ce-b5e7-0310-ab8b-a85725594a96