docs: Adding manpages for the command-line tools

Change-Id: I3eba0d125f7da51696342edce1a2f1ee33a0471a
refs: #1446
diff --git a/docs/manpages/nrd.rst b/docs/manpages/nrd.rst
index 2f03b2a..31fb384 100644
--- a/docs/manpages/nrd.rst
+++ b/docs/manpages/nrd.rst
@@ -1,67 +1,34 @@
 NRD (NFD RIB Daemon)
-========================
+====================
 
-NRD is a complementary daemon designed to work in parallel with NFD
-and to provide services for Routing Information Base management and
-constructing NFD's FIB:
+Usage
+-----
+
+::
+
+    nrd [options]
+
+
+Description
+-----------
+
+NRD is a complementary daemon designed to work in parallel with NFD and to provide
+services for Routing Information Base management and constructing NFD's FIB:
 
 * prefix registration from applications;
 * manual prefix registration;
 * prefix registrations from multiple dynamic routing protocols.
 
-Running and Configuring NRD
----------------------------
+NRD's runtime settings may be modified via `rib_*` sections in NFD's configuration file.
 
-NRD's runtime settings may be modified via configuration file. After
-installation, a working sample configuration is provided at
-``SYSCONFDIR/ndn/nrd.conf.sample``. At startup, NRD will attempt to read
-the default configuration file from following location:
-``SYSCONFDIR/ndn/nrd.conf``.
+Options:
+--------
 
-You may also specify an alternative configuration file location by
-running NRD with:
+``--help``
+  Print this help message.
 
-::
+``--modules``
+  List available logging modules
 
-    nrd --config </path/to/nrd.conf>
-
-Currently, nrd.conf contains only a security section, which is well
-documented in the sample configuration file.
-
-Starting experiments
---------------------
-
-1. Build, install and setup NFD by following the directions provided in
-   README.md in NFD root folder.
-
-2. Create certificates by following the instructions in NFD's README.md
-
-3. Build and install NRD by following the directions in INSTALL.md
-
-4. Create nrd.conf file. You can simply copy the provided sample file in
-   ``SYSCONFDIR/ndn/nrd.conf``.
-
-5. Setup the trust-anchors in nrd.conf. Ideally, the prefix registration
-   Interest should be signed by application/user key, and this
-   application/user key should be used as trust-anchor. However,
-   currently the default certificate is used to sign the registration
-   Interests. Therefore, for initial testing the default certificate
-   should be set as the trust-anchor. For doing so, the default
-   certificate should be copied in the same folder where the nrd.conf
-   is. Secondly, the trust-anchor should point to the copied certificate
-   in nrd.conf. To know the id of default certificate you can use:
-
-   ~$ ndnsec-get-default
-
-6. Start NFD (assuming the NFD's conf file exist in
-   ``SYSCONFDIR/ndn/nfd.conf``):
-
-   ~$ nfd
-
-7. Start NRD (assuming the conf file exist in
-   ``SYSCONFDIR/ndn/nrd.conf``):
-
-   ~$ nrd
-
-8. Try to connect any application to NFD. For example, producer
-   application that is provided ndn-cxx examples.
+``--config <path/to/nfd.conf>``
+  Specify the path to nfd configuration file (default: ``${SYSCONFDIR}/ndn/nfd.conf``).