docs: ndnsec man pages improvements

 * Add a "See Also" section to most pages
 * Streamline/clarify some sentences
 * Refresh a few examples

Change-Id: I3e0b62ad01c06faac632a120cde22a8da472426e
diff --git a/docs/manpages/ndnsec-set-default.rst b/docs/manpages/ndnsec-set-default.rst
index 05c6677..3f6b981 100644
--- a/docs/manpages/ndnsec-set-default.rst
+++ b/docs/manpages/ndnsec-set-default.rst
@@ -4,14 +4,14 @@
 Synopsis
 --------
 
-**ndnsec-set-default** [**-h**] [**-k**\|\ **-c**] *name*
+**ndnsec set-default** [**-h**] [**-k**\|\ **-c**] *name*
 
 Description
 -----------
 
-:program:`ndnsec-set-default` allows changing the default security settings.
+This command allows changing the default security settings.
 
-Without any options, *name*, which must be an identity name, is set as the
+Without any options, *name*, which must refer to an existing NDN identity, is set as the
 default identity for the current user.
 
 Options
@@ -19,25 +19,30 @@
 
 .. option:: -k, --default-key
 
-   Set *name*, which must be a key name, as the default key for the
-   corresponding identity.
+   Set *name*, which must be a key name, as the default key for the corresponding identity.
 
 .. option:: -c, --default-cert
 
-   Set *name*, which must be a certificate name, as the default certificate
-   for the corresponding key.
+   Set *name*, which must be a certificate name, as the default certificate for the
+   corresponding key.
 
-Example
--------
+Examples
+--------
 
 Set a key's default certificate::
 
-    $ ndnsec-set-default -c /ndn/test/KEY/alice/ksk-1394129695025/ID-CERT/%FD%01D%98%9A%F2%3F
+    $ ndnsec set-default -c /ndn/test/KEY/alice/ksk-1394129695025/ID-CERT/%FD%01D%98%9A%F2%3F
 
 Set an identity's default key::
 
-    $ ndnsec-set-default -k /ndn/test/alice/ksk-1394129695025
+    $ ndnsec set-default -k /ndn/test/alice/ksk-1394129695025
 
 Set the user's default identity::
 
-    $ ndnsec-set-default /ndn/test/alice
+    $ ndnsec set-default /ndn/test/alice
+
+See Also
+--------
+
+:manpage:`ndnsec-get-default(1)`,
+:manpage:`ndnsec-list(1)`