core: reimplement logging using ndn-cxx's facility

Change-Id: Ifc7c5d70a61ad405dc1f1adfa522a2c0ad1586ab
Refs: #4580
diff --git a/daemon/face/websocket-factory.cpp b/daemon/face/websocket-factory.cpp
index c61d900..11921cc 100644
--- a/daemon/face/websocket-factory.cpp
+++ b/daemon/face/websocket-factory.cpp
@@ -30,7 +30,7 @@
 
 namespace ip = boost::asio::ip;
 
-NFD_LOG_INIT("WebSocketFactory");
+NFD_LOG_INIT(WebSocketFactory);
 NFD_REGISTER_PROTOCOL_FACTORY(WebSocketFactory);
 
 const std::string&