-misc fixes, in particular actually build bf

git-svn-id: https://gnunet.org/svn/gnunet@34451 140774ce-b5e7-0310-ab8b-a85725594a96
-doxygen, style

git-svn-id: https://gnunet.org/svn/gnunet@34452 140774ce-b5e7-0310-ab8b-a85725594a96
-avoid use after free during set intersection completion

git-svn-id: https://gnunet.org/svn/gnunet@34453 140774ce-b5e7-0310-ab8b-a85725594a96
-remove dead state

git-svn-id: https://gnunet.org/svn/gnunet@34454 140774ce-b5e7-0310-ab8b-a85725594a96
-fix ftbfs

git-svn-id: https://gnunet.org/svn/gnunet@34455 140774ce-b5e7-0310-ab8b-a85725594a96