Index: trunk/CONTRIBUTION
===================================================================
--- trunk/CONTRIBUTION	(revision 13231)
+++ trunk/CONTRIBUTION	(revision 13350)
@@ -71,4 +71,8 @@
 with the New (2-clause) BSD license.
 
+The XZ code (https://tukaani.org/xz/java.html)
+is from Lasse Collin and Igor Pavlov
+and license free Public Domain.
+
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