tools: deprecate tlvdump

refs #3196

Change-Id: I7b3925158ec8883d202fcaec497c8c4a3f0cada4
diff --git a/docs/manpages/tlvdump.rst b/docs/manpages/tlvdump.rst
index eb50961..92c7225 100644
--- a/docs/manpages/tlvdump.rst
+++ b/docs/manpages/tlvdump.rst
@@ -3,6 +3,12 @@
 
 ``tlvdump`` is a simple application allowing to decode structure of TLV-encoded packet.
 
+Deprecated
+----------
+
+tlvdump is deprecated and will be removed in a future release of ndn-cxx.
+Please use ``ndn-dissect`` program from ndn-tools repository `<https://github.com/named-data/ndn-tools>`__.
+
 Usage
 -----