-indentation fixes, some fixes to message size checks, some code cleanup

git-svn-id: https://gnunet.org/svn/gnunet@34460 140774ce-b5e7-0310-ab8b-a85725594a96
simplify logic

git-svn-id: https://gnunet.org/svn/gnunet@34461 140774ce-b5e7-0310-ab8b-a85725594a96
-code cleanups

git-svn-id: https://gnunet.org/svn/gnunet@34462 140774ce-b5e7-0310-ab8b-a85725594a96