removing dead code, improving comments, simplifying iteration logic, making iteration over all addresses also faster

git-svn-id: https://gnunet.org/svn/gnunet@34626 140774ce-b5e7-0310-ab8b-a85725594a96
-bump year

git-svn-id: https://gnunet.org/svn/gnunet@34627 140774ce-b5e7-0310-ab8b-a85725594a96