fixes for the solver and perf tool


git-svn-id: https://gnunet.org/svn/gnunet@33247 140774ce-b5e7-0310-ab8b-a85725594a96
towards PEERSTORE iterate


git-svn-id: https://gnunet.org/svn/gnunet@33248 140774ce-b5e7-0310-ab8b-a85725594a96