fixing documentation for hello


git-svn-id: https://gnunet.org/svn/gnunet@31928 140774ce-b5e7-0310-ab8b-a85725594a96
- add explicit shutdown state
- don't try to reconnect when destroying last connection during tunnel_destroy
- don't create new connections for a tunnel in shutdown



git-svn-id: https://gnunet.org/svn/gnunet@31929 140774ce-b5e7-0310-ab8b-a85725594a96
-when tunnel is empty
-- don't end connections
-- don't stop encryption handshake



git-svn-id: https://gnunet.org/svn/gnunet@31930 140774ce-b5e7-0310-ab8b-a85725594a96
fix #3272

git-svn-id: https://gnunet.org/svn/gnunet@31931 140774ce-b5e7-0310-ab8b-a85725594a96
documentation for transport service


git-svn-id: https://gnunet.org/svn/gnunet@31932 140774ce-b5e7-0310-ab8b-a85725594a96