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-get-default.rst b/docs/manpages/ndnsec-get-default.rst
index 0a27dee..aa9e7d9 100644
--- a/docs/manpages/ndnsec-get-default.rst
+++ b/docs/manpages/ndnsec-get-default.rst
@@ -4,15 +4,17 @@
 Synopsis
 --------
 
-**ndnsec-get-default** [**-h**] [**-k**\|\ **-c**] [**-i** *identity*\|\ **-K** *key*] [**-q**]
+**ndnsec get-default** [**-h**] [**-k**\|\ **-c**] [**-i** *identity*\|\ **-K** *key*]
+[**-q**]
 
 Description
 -----------
 
-Given a particular entity, :program:`ndnsec-get-default` shows its default settings
-according to the command-line options. By default, if neither **-i** nor **-K** is
-given, the command displays the default identity or the default key/certificate of
-the default identity.
+This command shows the default settings of the local **Public Information Base (PIB)**
+or those of a specific PIB identity or key.
+
+By default, if neither :option:`-i` nor :option:`-K` is given, the command displays
+the default identity or the default key/certificate of the default identity.
 
 Options
 -------
@@ -37,20 +39,26 @@
 
    Disable printing the trailing newline character.
 
-Example
--------
+Examples
+--------
 
 Display an identity's default key name::
 
-    $ ndnsec-get-default -k -i /ndn/test/alice
+    $ ndnsec get-default -k -i /ndn/test/alice
     /ndn/test/alice/ksk-1394129695025
 
 Display an identity's default certificate name::
 
-    $ ndnsec-get-default -c -i /ndn/test/alice
+    $ ndnsec get-default -c -i /ndn/test/alice
     /ndn/test/KEY/alice/ksk-1394129695025/ID-CERT/%FD%01D%98%9A%F2%3F
 
 Display a key's default certificate name::
 
-    $ ndnsec-get-default -c -K /ndn/test/alice/ksk-1394129695025
+    $ ndnsec get-default -c -K /ndn/test/alice/ksk-1394129695025
     /ndn/test/KEY/alice/ksk-1394129695025/ID-CERT/%FD%01D%98%9A%F2%3F
+
+See Also
+--------
+
+:manpage:`ndnsec-list(1)`,
+:manpage:`ndnsec-set-default(1)`