- fix crash on unexpected malformed PING

git-svn-id: https://gnunet.org/svn/gnunet@33705 140774ce-b5e7-0310-ab8b-a85725594a96
- make sure the keepalive test generates more than 2 keepalives

git-svn-id: https://gnunet.org/svn/gnunet@33706 140774ce-b5e7-0310-ab8b-a85725594a96
- ignore

git-svn-id: https://gnunet.org/svn/gnunet@33707 140774ce-b5e7-0310-ab8b-a85725594a96