nfd + ndn-cxx: New ports

Change-Id: I7ea6eba5828fca96409117debdcb8a0af87e5ff4
diff --git a/net/nfd/files/nfd-stop b/net/nfd/files/nfd-stop
new file mode 100755
index 0000000..2d64e9f
--- /dev/null
+++ b/net/nfd/files/nfd-stop
@@ -0,0 +1,4 @@
+#!/bin/sh
+
+sudo launchctl unload -w /Library/LaunchDaemons/net.named-data.nfd.plist
+sudo launchctl unload -w /Library/LaunchDaemons/net.named-data.nrd.plist