reconnect on error


git-svn-id: https://gnunet.org/svn/gnunet@33271 140774ce-b5e7-0310-ab8b-a85725594a96
implemented mip gap


git-svn-id: https://gnunet.org/svn/gnunet@33272 140774ce-b5e7-0310-ab8b-a85725594a96