begins with the SOURCE variable and that there is at least one usage of the
OPEN_PORTS and KEY variables. The OPEN_PORTS requirement might be relaxed when
PERMIT_CLIENT_PORTS handling is added.
git-svn-id: file:///home/mbr/svn/fwknop/trunk@199 510a4753-2344-4c79-9c09-4d669213fbeb