Add a clear OpenSSL exception.

We are linking with OpenSSL in 2 files, so make it clear we intentionally
add a GPLv3 exception to allow that linking by third parties.

Signed-off-by: Simo Sorce <simo@redhat.com>
Reviewed-By: Nathaniel McCallum <npmccallum@redhat.com>

COPYING.openssl

@@ -0,0 +1,16 @@
+ADDITIONAL PERMISSIONS
+
+This file is a modification of the main license file (COPYING), which
+contains the license terms. It applies only to specific files in the
+tree that include an "OpenSSL license exception" disclaimer.
+
+In addition to the governing license (GPLv3), as a special exception,
+the copyright holders give permission to link the code of this program
+with the OpenSSL library, 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 file(s) with this
+exception, you may extend this exception to your version of the file(s),
+but you are not obligated to do so. If you do not wish to do so, delete
+this exception statement from your version. If you delete the exception
+statement from all source files in the program, then also delete it here.

ipapython/ipap11helper/p11helper.c

@@ -1,6 +1,9 @@
 /*
  * Copyright (C) 2014  FreeIPA Contributors see COPYING for license
  *
+ * This file includes an "OpenSSL license exception", see the
+ * COPYING.openssl file for details.
+ *
  * This code is based on PKCS#11 code snippets from NLnetLabs:
  * http://www.nlnetlabs.nl/publications/hsm/examples/pkcs11/
  * Original license follows:

util/ipa_pwd_ntlm.c

@@ -18,6 +18,10 @@
  *
  * You should have received a copy of the GNU General Public License
  * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ *
+ * This file includes an "OpenSSL license exception", see the
+ * COPYING.openssl file for details.
+ *
  */
 
 #include <stdbool.h>