HPUX patch from Alexander Melnikov.
diff --git a/CONTRIBUTORS.txt b/CONTRIBUTORS.txt
index f9f2a6a..d2c3d18 100644
--- a/CONTRIBUTORS.txt
+++ b/CONTRIBUTORS.txt
@@ -72,3 +72,5 @@
     * Emacs mode for Protocol Buffers (editors/protobuf-mode.el).
   Scott Stafford <scott.stafford@gmail.com>
     * Added Swap(), SwapElements(), and RemoveLast() to Reflection interface.
+  Alexander Melnikov <alm@sibmail.ru>
+    * HPUX support.