mgmt: move management/nfd-* to mgmt/nfd/

refs #3760

Change-Id: Ib4bde3412b5c39b9f4f46113199cebe78704505e
diff --git a/src/detail/face-impl.hpp b/src/detail/face-impl.hpp
index a7c332d..998ab34 100644
--- a/src/detail/face-impl.hpp
+++ b/src/detail/face-impl.hpp
@@ -37,8 +37,8 @@
 #include "../transport/unix-transport.hpp"
 #include "../transport/tcp-transport.hpp"
 
-#include "../management/nfd-controller.hpp"
-#include "../management/nfd-command-options.hpp"
+#include "../mgmt/nfd/controller.hpp"
+#include "../mgmt/nfd/command-options.hpp"
 
 #include "../lp/packet.hpp"
 #include "../lp/tags.hpp"