Use more-or-equal (some machines are fast enough)

git-svn-id: https://gnunet.org/svn/gnunet@31558 140774ce-b5e7-0310-ab8b-a85725594a96
malloc -> new

git-svn-id: https://gnunet.org/svn/gnunet@31559 140774ce-b5e7-0310-ab8b-a85725594a96