- debug info on error

git-svn-id: https://gnunet.org/svn/gnunet@34047 140774ce-b5e7-0310-ab8b-a85725594a96
- inform about dropped messages

git-svn-id: https://gnunet.org/svn/gnunet@34048 140774ce-b5e7-0310-ab8b-a85725594a96
- if an "old_key" is not valid (for instance, at tunnel establishment), clear the context ASAP

git-svn-id: https://gnunet.org/svn/gnunet@34049 140774ce-b5e7-0310-ab8b-a85725594a96
- fix handling of SYNACK corner case

git-svn-id: https://gnunet.org/svn/gnunet@34050 140774ce-b5e7-0310-ab8b-a85725594a96
- fix error condition

git-svn-id: https://gnunet.org/svn/gnunet@34051 140774ce-b5e7-0310-ab8b-a85725594a96