changes in ACK handling


git-svn-id: https://gnunet.org/svn/gnunet@32823 140774ce-b5e7-0310-ab8b-a85725594a96
cancel delayed disconnect task on free


git-svn-id: https://gnunet.org/svn/gnunet@32824 140774ce-b5e7-0310-ab8b-a85725594a96