tools: Automatically start ndn-autoconfig in nfd-start, if enabled in autoconfig.conf

Change-Id: I09d3fff87f00ce8684e6e304e8327f9d03ca18bf
Refs: #2716
diff --git a/docs/manpages/ndn-autoconfig.conf.rst b/docs/manpages/ndn-autoconfig.conf.rst
new file mode 100644
index 0000000..c3fa015
--- /dev/null
+++ b/docs/manpages/ndn-autoconfig.conf.rst
@@ -0,0 +1,22 @@
+.. _ndn-autoconfig.conf:
+
+autoconfig.conf
+===============
+
+Overview
+--------
+
+Configuration of NDN auto-configuration client daemon in INI format.  Comments in the
+configuration file must be prefixed with ``#``.
+
+Example of ``autoconfig.conf``:
+
+.. literalinclude:: ../../autoconfig.conf.sample
+
+Options
+-------
+
+``enabled``
+  (default: false) Enable or disable automatic NDN auto-configuration client daemon.
+
+  When enabled, NDN auto-configuration client daemon is automatically started by ``nfd-start``.