logread: more generic message type regexp

git-svn-id: https://gnunet.org/svn/gnunet@32574 140774ce-b5e7-0310-ab8b-a85725594a96
PSYC: implement slave to master requests, tests, fixes, reorg

Multicast lib: handle member to origin requests.
Keep track of members and origins and call their callbacks when necessary.

git-svn-id: https://gnunet.org/svn/gnunet@32575 140774ce-b5e7-0310-ab8b-a85725594a96