This is from the file COPYING in the valknut and dclib
tarballs.  Immediately following it is the GPL 2 license.

****
In addition, as a special exception, Mathias K<FC>ster give
permission to link the code of this program with the OpenSSL
library (or with modified versions of OpenSSL that use the
same license as OpenSSL), and distribute linked combinations
including the two.  You must obey the GNU General Public License
in all respects for all of the code used other than OpenSSL.
If you modify this file, you may extend this exception to your
version of the file, but you are not obligated to do so.
If you do not wish to do so, delete this exception statement
from your version.
****