message: Use Logging namespace to access LogAcceptCategory
  LogAcceptCategory and the enum used to define available logging
  category is defined inside the Logging namespace. If used directly
  outside of util.{h,cpp} reference to such namespace is needed.
  This commit fix issue
diff: @@ -410,7 +410,7 @@ bool InitHTTPServer()
  #if LIBEVENT_VERSION_NUMBER >= 0x02010100
  // If -debug=libevent, set full libevent debugging.
  // Otherwise, disable all libevent debugging.
  - if (LogAcceptCategory(LIBEVENT))
  + if (LogAcceptCategory(Logging::LIBEVENT))
  event_enable_debug_logging(EVENT_DBG_ALL);
  else
  event_enable_debug_logging(EVENT_DBG_NONE);
  