docs: fix linking to ndnsec-* man pages

And various other minor improvements

Change-Id: Idac7629ce2728ddb641bacfc020314ae3d7f00b9
diff --git a/docs/manpages.rst b/docs/manpages.rst
index c88228e..7f01d30 100644
--- a/docs/manpages.rst
+++ b/docs/manpages.rst
@@ -1,20 +1,10 @@
-Manpages
-========
+Man pages
+=========
 
 .. toctree::
-    ndn-client.conf     <manpages/ndn-client.conf>
-    ndn-cxx logging     <manpages/ndn-log>
-    manpages/ndnsec
-    ndnsec-list         <manpages/ndnsec-list>
-    ndnsec-get-default  <manpages/ndnsec-get-default>
-    ndnsec-set-default  <manpages/ndnsec-set-default>
-    ndnsec-key-gen      <manpages/ndnsec-key-gen>
-    ndnsec-sign-req     <manpages/ndnsec-sign-req>
-    ndnsec-cert-gen     <manpages/ndnsec-cert-gen>
-    ndnsec-cert-install <manpages/ndnsec-cert-install>
-    ndnsec-cert-dump    <manpages/ndnsec-cert-dump>
-    ndnsec-delete       <manpages/ndnsec-delete>
-    ndnsec-export       <manpages/ndnsec-export>
-    ndnsec-import       <manpages/ndnsec-import>
-    ndnsec-unlock-tpm   <manpages/ndnsec-unlock-tpm>
+    :glob:
     :maxdepth: 1
+
+    ndn-client.conf <manpages/ndn-client.conf>
+    ndn-log: ndn-cxx logging <manpages/ndn-log>
+    manpages/ndnsec*