-gns is user service

git-svn-id: https://gnunet.org/svn/gnunet@31724 140774ce-b5e7-0310-ab8b-a85725594a96
-avoid bashisms

git-svn-id: https://gnunet.org/svn/gnunet@31725 140774ce-b5e7-0310-ab8b-a85725594a96
-fixes

git-svn-id: https://gnunet.org/svn/gnunet@31726 140774ce-b5e7-0310-ab8b-a85725594a96