nfd: update Unix socket path in nfd.conf

refs #5304

Change-Id: Ib9743230c00777404aa358b0f6d16ddb489db945
diff --git a/nfd/debian/nfd.conf b/nfd/debian/nfd.conf
index d309796..9ce3bad 100644
--- a/nfd/debian/nfd.conf
+++ b/nfd/debian/nfd.conf
@@ -90,14 +90,12 @@
   ; The unix section contains settings for Unix stream faces and channels.
   ; A Unix channel is always listening; delete the unix section to disable
   ; Unix stream faces and channels.
-  ;
-  ; The ndn-cxx library expects unix:///var/run/nfd.sock to be used as
-  ; the default transport option. Please change the "transport" field
-  ; in client.conf to an appropriate tcp4 FaceUri if you want to
-  ; disable Unix sockets and use TCP instead.
   unix
   {
-    path /var/run/nfd.sock ; Unix stream listener path
+    ; The default transport is 'unix:///run/nfd/nfd.sock' (on Linux) or 'unix:///var/run/nfd/nfd.sock' (on
+    ; other platforms). This should match the 'transport' field in client.conf for ndn-cxx. If you wish
+    ; to use TCP instead of Unix sockets with ndn-cxx, change 'transport' to an appropriate TCP FaceUri.
+    path /run/nfd/nfd.sock ; Unix stream listener path
   }
 
   ; The tcp section contains settings for TCP faces and channels.