conf: Fix typos in security section

refs: #1985

Change-Id: I585ff9d6436db3102bc6860e428c95ca12fd6724
diff --git a/nlsr.conf b/nlsr.conf
index f204d12..f669d7f 100644
--- a/nlsr.conf
+++ b/nlsr.conf
@@ -222,12 +222,17 @@
       file-name "root.cert"
     }
   }
-  ; cert-to-publish "root.cert"  ; optional, a file containing the root certificate. only the router
-                                 ; that is designated to publish root cert needs to specify this
-  ; cert-to-publish "site.cert"  ; optional, a file containing the root certificate. only the router
-                                 ; that is designated to publish site cert need to specify this
-  ; cert-to-publish "operator.cert" ; optional, a file containing the root certificate. only the
-                                    ; router that is designated to publish operator cert need to
-                                    ; specify this
+  ; cert-to-publish "root.cert"  ; optional, a file containing the root certificate
+                                 ; Only the router that is designated to publish the root cert
+                                 ; needs to specify this
+
+  ; cert-to-publish "site.cert"  ; optional, a file containing the site certificate
+                                 ; Only the router that is designated to publish the site cert
+                                 ; needs to specify this
+
+  ; cert-to-publish "operator.cert" ; optional, a file containing the operator certificate
+                                    ; Only the router that is designated to publish the operator
+                                    ; cert needs to specify this
+
   cert-to-publish "router.cert"  ; required, a file containing the router certificate.
 }