transport: use /run/nfd.sock on Linux

refs #5039

Change-Id: Ia81115676427db1ebdf4d72d9aadf2e34e2f0ae6
diff --git a/docs/manpages/ndn-client.conf.rst b/docs/manpages/ndn-client.conf.rst
index 62f42ca..5908972 100644
--- a/docs/manpages/ndn-client.conf.rst
+++ b/docs/manpages/ndn-client.conf.rst
@@ -19,10 +19,11 @@
 ---
 
 transport
-  FaceUri for default connection toward local NDN forwarder.  Only ``unix`` and ``tcp4`` FaceUris
-  can be specified here.
+  FaceUri for default connection toward local NDN forwarder.  Only ``unix``, ``tcp``, ``tcp4``, and
+  ``tcp6`` FaceUris can be specified here.
 
-  By default, ``unix:///var/run/nfd.sock`` is used.
+  By default, ``unix:///run/nfd.sock`` is used on Linux and ``unix:///var/run/nfd.sock`` is used on
+  other platforms.
 
   .. note::
     This value can be overridden using the ``NDN_CLIENT_TRANSPORT`` environment variable.