src: Updating code to compile with the latest ndn-cxx library

This commit includes updates against the latest Face API and replaces
uses of deprecated methods.

Change-Id: I33ad398d26f8faf9f9627ff329ce0936e0911ab2
diff --git a/tools/nfd-autoreg.cpp b/tools/nfd-autoreg.cpp
index 3d8dc98..a219e62 100644
--- a/tools/nfd-autoreg.cpp
+++ b/tools/nfd-autoreg.cpp
@@ -229,7 +229,7 @@
                            bind(&AutoregServer::onNotification, this, _2),
                            bind(&AutoregServer::onTimeout, this, _1));
 
-    boost::asio::signal_set signalSet(*m_face.ioService(), SIGINT, SIGTERM);
+    boost::asio::signal_set signalSet(m_face.getIoService(), SIGINT, SIGTERM);
     signalSet.async_wait(bind(&AutoregServer::signalHandler, this));
 
     m_face.processEvents();