tools: ndnsec-cert-revoke command

Change-Id: Id4b43460345015794650f9bc2191869c687a7c46
Refs: #1666
diff --git a/docs/manpages.rst b/docs/manpages.rst
index 6907bee..ad28cc6 100644
--- a/docs/manpages.rst
+++ b/docs/manpages.rst
@@ -9,6 +9,7 @@
     ndnsec-key-gen      <manpages/ndnsec-key-gen>
     ndnsec-sign-req     <manpages/ndnsec-sign-req>
     ndnsec-cert-gen     <manpages/ndnsec-cert-gen>
+    ndnsec-cert-revoke  <manpages/ndnsec-cert-revoke>
     ndnsec-cert-install <manpages/ndnsec-cert-install>
     ndnsec-cert-dump    <manpages/ndnsec-cert-dump>
     ndnsec-delete       <manpages/ndnsec-delete>