- improve dealing with duplicate channel create (in case of replay attack / missed channel ACK)


git-svn-id: https://gnunet.org/svn/gnunet@31053 140774ce-b5e7-0310-ab8b-a85725594a96
- dont use millisecond restransmit delays for "synack" retransmission


git-svn-id: https://gnunet.org/svn/gnunet@31054 140774ce-b5e7-0310-ab8b-a85725594a96
- avoid dereferencing copy after channel (and therefore copy) was destroyed


git-svn-id: https://gnunet.org/svn/gnunet@31055 140774ce-b5e7-0310-ab8b-a85725594a96