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-cert-dump.rst b/docs/manpages/ndnsec-cert-dump.rst
index c5ca0d9..2acab6e 100644
--- a/docs/manpages/ndnsec-cert-dump.rst
+++ b/docs/manpages/ndnsec-cert-dump.rst
@@ -4,14 +4,15 @@
 Synopsis
 --------
 
-**ndnsec-cert-dump** [**-h**] [**-p**] [**-r** [**-H** *host*] [**-P** *port*]]
+**ndnsec cert-dump** [**-h**] [**-p**] [**-r** [**-H** *host*] [**-P** *port*]]
 [**-i**\|\ **-k**\|\ **-f**] *name*
 
 Description
 -----------
 
-:program:`ndnsec-cert-dump` reads a certificate from the **Public Info Base (PIB)**
-or from a file, and prints it on the standard output in Base64 encoding.
+This command reads an NDN certificate, either from the **Public Information Base (PIB)**
+or from the specified file, and prints it on the standard output, either in Base64 encoding
+or in a human-readable format.
 
 By default, *name* is interpreted as a certificate name.
 
@@ -37,16 +38,23 @@
 
    Print the certificate in a human-readable format.
 
-Example
--------
+Examples
+--------
 
-Dump a certificate from PIB to standard output::
+Export a certificate from the local PIB to the standard output with Base64 encoding::
 
-    $ ndnsec-cert-dump /ndn/test/david/KEY/ksk-1396913058196/ID-CERT/%00%00%01E%3E%9D%A0%DE
+    $ ndnsec cert-dump /ndn/test/david/KEY/%7FE%1C%18%D2%03%BD%3F/self/v=1719080300644
+    Bv0BOAcxCANuZG4IBHRlc3QIBWRhdmlkCANLRVkICH9FHBjSA70/CARzZWxmNggA
+    AAGQQSuwZBQJGAECGQQANu6AFVswWTATBgcqhkjOPQIBBggqhkjOPQMBBwNCAAQ8
+    7QbdgubF3IznydpZ8PuppHgVRufGsUMDvHpS8Rw93rAAsw+8aVcNmw94wzpALWzD
+    3femcs+qHaWoIOBOn26SFlIbAQMcIwchCANuZG4IBHRlc3QIBWRhdmlkCANLRVkI
+    CH9FHBjSA70//QD9Jv0A/g8yMDI0MDYyMlQxODE4MjD9AP8PMjA0NDA2MTdUMTgx
+    ODIwF0cwRQIhAPqG+GtIQlbcgB9ZFAGCKcO7DBMK+K3RinEAbzqKpFTcAiAp+D8L
+    z/S6nPNtSTGBBxr4cdUecjIHxKN6DoP3K1o2yg==
 
 Print the NDN testbed root certificate in human-readable format::
 
-    $ curl -A ndnsec -fsLS https://named-data.net/ndnsec/ndn-testbed-root.ndncert.x3.base64 | ndnsec-cert-dump -fp -
+    $ curl -A ndnsec -fsLS https://named-data.net/ndnsec/ndn-testbed-root.ndncert.x3.base64 | ndnsec cert-dump -fp -
     Certificate Name:
       /ndn/KEY/%EC%F1L%8EQ%23%15%E0/ndn/%FD%00%00%01u%E6%7F2%10
     Additional Description:
@@ -62,3 +70,9 @@
       Signature Type: SignatureSha256WithEcdsa
       Key Locator: Name=/ndn/KEY/%EC%F1L%8EQ%23%15%E0
       Self-Signed: yes
+
+See Also
+--------
+
+:manpage:`ndnsec-cert-install(1)`,
+:manpage:`ndnsec-export(1)`