mgmt: enable UDP and Ethernet multicast in default configuration

refs: #1332

Change-Id: I44c5c74d114b869ddc8ca360ca50fe956797e0a3
diff --git a/nfd.conf.sample.in b/nfd.conf.sample.in
index c915202..3bc3db5 100644
--- a/nfd.conf.sample.in
+++ b/nfd.conf.sample.in
@@ -27,7 +27,7 @@
     idle_timeout 600 ; idle time (seconds) before closing a UDP unicast face
     keep_alive_interval 25; interval (seconds) between keep-alive refreshes
 
-    mcast no
+    mcast yes
 
     ; Example multicast settings
     ; NFD creates one UDP multicast face per NIC
@@ -62,7 +62,7 @@
 
   ether
   {
-    mcast no
+    mcast yes
 
   ;    Example multicast settings
   ;    NFD creates one Ethernet multicast face per NIC