clean up configuration parameters and implementation


git-svn-id: https://gnunet.org/svn/gnunet@32058 140774ce-b5e7-0310-ab8b-a85725594a96
minor fix in averaging


git-svn-id: https://gnunet.org/svn/gnunet@32059 140774ce-b5e7-0310-ab8b-a85725594a96