SO_REUSEPORT may be defined, but not supported.
diff --git a/CHANGELOG b/CHANGELOG
index 444f985..141bb1c 100644
--- a/CHANGELOG
+++ b/CHANGELOG
@@ -52,6 +52,11 @@
 	    Allow a trailing '*' wildcard in all interface-name
 	    configurations. Thanks to Christian Parpart for the patch.
 
+	    Handle the situation where libc headers define
+	    SO_REUSEPORT, but the kernel in use doesn't, to cope with
+	    the introduction of this option to Linux. Thanks to Rich
+	    Felker for the bug report.
+
   
 version 2.65
 	    Fix regression which broke forwarding of queries sent via