tools: implement 'nfdc cs info' command

refs #4219

Change-Id: I4252878943c3f6c88f306f83f5023fffc82326b0
diff --git a/docs/manpages/nfdc-cs.rst b/docs/manpages/nfdc-cs.rst
new file mode 100644
index 0000000..cef31b8
--- /dev/null
+++ b/docs/manpages/nfdc-cs.rst
@@ -0,0 +1,14 @@
+nfdc-cs
+===========
+
+SYNOPSIS
+--------
+| nfdc cs info
+
+DESCRIPTION
+-----------
+The **nfdc cs info** command shows CS statistics information.
+
+SEE ALSO
+--------
+nfd(1), nfdc(1)