update: Add/delete prefix to the conf file

refs: #4303

Change-Id: I401885bf76be90a5076365eebc311275461813c4
diff --git a/docs/manpages/nlsrc.rst b/docs/manpages/nlsrc.rst
index 83d7795..352a537 100644
--- a/docs/manpages/nlsrc.rst
+++ b/docs/manpages/nlsrc.rst
@@ -43,6 +43,11 @@
       ``name``
         The Name prefix to be advertised
 
+    ``advertise <name> save``
+
+      ``save``
+        Advertise a prefix and also save it to the nlsr.conf file for the next start of NLSR
+
   ``withdraw``
     Remove a Name prefix advertised through NLSR
 
@@ -51,6 +56,11 @@
       ``name``
         The Name prefix to be withdrawn
 
+    ``withdraw <name> delete``
+
+      ``delete``
+        Withdraw a prefix and also delete it from the nlsr.conf file
+
 Notes
 -----