nlsrc: run command on remote router

refs #4544

Change-Id: I977ebfb94c84730bd2bcc73515f77cc4773ec2de
diff --git a/docs/manpages/nlsrc.rst b/docs/manpages/nlsrc.rst
index 2508fb3..f91706b 100644
--- a/docs/manpages/nlsrc.rst
+++ b/docs/manpages/nlsrc.rst
@@ -6,7 +6,8 @@
 
 ::
 
-    nlsrc [-h] [-V] COMMAND [<Command Options>]
+    nlsrc [-h | -V]
+    nlsrc [-R <router prefix> [-c <nlsr.conf path> | -k]] COMMAND [<Command Options>]
 
 
 Description
@@ -24,6 +25,17 @@
 ``-V``
   Show NLSRC version information
 
+``-R <router prefix>``
+  Target a remote NLSR instance.
+  The default is the local NLSR instance ``/localhost``.
+
+``-c <nlsr.conf path>``
+  Verify remote status information with the trust schema loaded from ``security.validator`` section of specified nlsr.conf config file.
+  The default is loading from ``/etc/ndn/nlsr.conf``.
+
+``-k``
+  Insecure: do not verify signature on status information retrieved from remote router.
+
 ``COMMAND``
 
   ``lsdb``