dissect: no longer dissect Content element by default

Use the new -c/--content option to enable it

Change-Id: Id5692b53a0921918bb029ad653b9f5504ab5e4ab
diff --git a/manpages/ndnpoke.rst b/manpages/ndnpoke.rst
index 39af974..220464f 100644
--- a/manpages/ndnpoke.rst
+++ b/manpages/ndnpoke.rst
@@ -63,8 +63,8 @@
 
 5: Prefix registration failed
 
-Example
--------
+Examples
+--------
 
 Create a Data packet with content ``hello`` and name ``/app/video`` and wait at
 most 3 seconds for a matching Interest to arrive::