Add Exception clause to license

git-svn-id: http://svn.savannah.gnu.org/svn/ccrtp/trunk@684 c26ef401-41b0-48d7-a563-427cd9f8604a

legal/LICENSE-ZRTP4J-exception.txt

@@ -0,0 +1,25 @@
+GNU ZRTP4J is distributed under the terms of the GNU General Public License 
+with the following clarification and special exception. 
+
+    Linking this library statically or dynamically with other modules is making
+    a combined work based on this library. Thus, the terms and conditions of 
+    the GNU General Public License cover the whole combination.
+
+    As a special exception, the copyright holders of this library give you 
+    permission to link this library with independent modules to produce an 
+    executable, regardless of the license terms of these independent modules, 
+    and to copy and distribute the resulting executable under terms of your
+    choice, provided that you also meet, for each linked independent module,
+    the terms and conditions of the license of that module. An independent 
+    module is a module which is not derived from or based on this library. If 
+    you modify this library, you may extend this exception to your version of 
+    the library, but you are not obligated to do so. If you do not wish to do
+    so, delete this exception statement from your version.
+
+This exception covers only the modules in the gnu.java.* packages. This
+exception is in effect even if it is not stated explicitly in the source files.
+Modules in the org.bouncycastle.* packages are not affected by this exception, 
+they use the original bouncycastle license (license file in this folder).
+
+As such, ZRTP4J can be used to run, create and distribute a large class of
+applications.