fix compile error


git-svn-id: https://gnunet.org/svn/gnunet@32053 140774ce-b5e7-0310-ab8b-a85725594a96
doxygen fixes


git-svn-id: https://gnunet.org/svn/gnunet@32054 140774ce-b5e7-0310-ab8b-a85725594a96
documentation for the performance benchmark


git-svn-id: https://gnunet.org/svn/gnunet@32055 140774ce-b5e7-0310-ab8b-a85725594a96
more documentation and minor cleanups


git-svn-id: https://gnunet.org/svn/gnunet@32056 140774ce-b5e7-0310-ab8b-a85725594a96