OpenBSD fixes corutesy of satadru@umich.edu


git-svn-id: https://svn.ntop.org/svn/ntop/trunk/nDPI@7260 a02cd0c1-8e76-42e1-a119-56f9641475e2
Improvements in Bittorrent (and UDP-based protocols) detection


git-svn-id: https://svn.ntop.org/svn/ntop/trunk/nDPI@7263 a02cd0c1-8e76-42e1-a119-56f9641475e2