face: make logging more uniform across channel types

Change-Id: I21db45f736e07464260dcc902c673d098ba3c549
Refs: #2561
diff --git a/daemon/face/face-log.hpp b/daemon/face/face-log.hpp
index 6e0b3fd..51ff4c6 100644
--- a/daemon/face/face-log.hpp
+++ b/daemon/face/face-log.hpp
@@ -1,6 +1,6 @@
 /* -*- Mode:C++; c-file-style:"gnu"; indent-tabs-mode:nil; -*- */
 /**
- * Copyright (c) 2014-2015,  Regents of the University of California,
+ * Copyright (c) 2014-2017,  Regents of the University of California,
  *                           Arizona Board of Regents,
  *                           Colorado State University,
  *                           University Pierre & Marie Curie, Sorbonne University,
@@ -53,6 +53,9 @@
   const T& obj;
 };
 
+} // namespace face
+} // namespace nfd
+
 /** \defgroup FaceLogging Face logging macros
  *
  * These macros augment the log message with some face-specific information,
@@ -62,6 +65,7 @@
  * @{
  */
 
+/** \internal */
 #define NFD_LOG_FACE(level, msg) NFD_LOG_##level( \
   ::nfd::face::FaceLogHelper< \
     typename std::remove_cv< \
@@ -87,7 +91,4 @@
 
 /** @} */
 
-} // namespace face
-} // namespace nfd
-
 #endif // NFD_DAEMON_FACE_FACE_LOG_HPP