tools: Add nlsrc command line tool

refs: #1834

Change-Id: Ifbe75a3f49e2689930e61ebfd348d9932b04c975
diff --git a/docs/manpages/nlsrc.rst b/docs/manpages/nlsrc.rst
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+nlsrc
+=====
+
+Usage
+-----
+
+::
+
+    nlsrc [-h] [-V] COMMAND [<Command Options>]
+
+
+Description
+-----------
+
+``nlsrc`` is a tool to retrieve link-state database (LSDB) status information from NLSR and
+announce/withdraw Name prefixes advertised by NLSR.
+
+Options
+-------
+
+``-h``
+  Print usage information
+
+``-V``
+  Show NLSRC version information
+
+``COMMAND``
+
+  ``status``
+    Retrieve LSDB status information
+
+  ``advertise``
+    Add a Name prefix to be advertised by NLSR
+
+    ``advertise <name>``
+
+      ``name``
+        The Name prefix to be advertised
+
+  ``withdraw``
+    Remove a Name prefix advertised through NLSR
+
+    ``withdraw <name>``
+
+      ``name``
+        The Name prefix to be withdrawn
+
+Exit Status
+-----------
+
+nlsrc exits with one of the following values:
+::
+
+  0     nlsrc exited successfully
+  >0    An error occurred