Revert "Add a license exception to link xl2tpd with OpenSSL"

Without commit f6a1c04 we no longer need to ask for a license exception.

This reverts commit f039398.

LICENSE

@@ -338,16 +338,3 @@ proprietary programs.  If your program is a subroutine library, you may
 consider it more useful to permit linking proprietary applications with the
 library.  If this is what you want to do, use the GNU Library General
 Public License instead of this License.
-
-
-Special exception for linking xl2tpd with OpenSSL:
-
-  In addition, as a special exception, Xelerance Corporation gives
-  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.