src: Remove unnecessary uses of boost::cref in make_shared and replace boost::cref/boost::ref with just cref/ref

In some cases, due to argument-dependent lookup, it is necessary to use
ndn::ref, instead of just ref.

Change-Id: I682180a007609535855f77511b49622154ad4f11
Refs: #1591
diff --git a/daemon/face/websocket-channel.cpp b/daemon/face/websocket-channel.cpp
index db7fdc0..f409dc9 100644
--- a/daemon/face/websocket-channel.cpp
+++ b/daemon/face/websocket-channel.cpp
@@ -78,7 +78,7 @@
       m_server.close(hdl, websocketpp::close::status::normal, "closed by channel", ecode);
     }
   shared_ptr<WebSocketFace> face = make_shared<WebSocketFace>(FaceUri(remote), this->getUri(),
-                                                              hdl, boost::ref(m_server));
+                                                              hdl, ref(m_server));
   m_onFaceCreatedCallback(face);
   m_channelFaces[hdl] = face;
 }