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

Change-Id: I09d3fff87f00ce8684e6e304e8327f9d03ca18bf
Refs: #2716
diff --git a/docs/manpages.rst b/docs/manpages.rst
index f945bf1..d3d97a5 100644
--- a/docs/manpages.rst
+++ b/docs/manpages.rst
@@ -10,6 +10,7 @@
    schema
    manpages/nfd-status-http-server
    manpages/ndn-autoconfig
+   manpages/ndn-autoconfig.conf
    manpages/ndn-autoconfig-server
    misc/local-prefix-discovery
    manpages/nfd-autoreg