face: make logging more uniform across channel types

Change-Id: I21db45f736e07464260dcc902c673d098ba3c549
Refs: #2561
diff --git a/daemon/face/websocket-channel.hpp b/daemon/face/websocket-channel.hpp
index 7da5647..c1b2805 100644
--- a/daemon/face/websocket-channel.hpp
+++ b/daemon/face/websocket-channel.hpp
@@ -103,12 +103,10 @@
   handleClose(websocketpp::connection_hdl hdl);
 
 private:
-  websocket::Endpoint m_localEndpoint;
+  const websocket::Endpoint m_localEndpoint;
   websocket::Server m_server;
-
   std::map<websocketpp::connection_hdl, shared_ptr<Face>,
            std::owner_less<websocketpp::connection_hdl>> m_channelFaces;
-
   FaceCreatedCallback m_onFaceCreatedCallback;
   time::milliseconds m_pingInterval;
 };