* Changed header file include guards to unique namespace. Updated file headers comments with SPDX [issue #55] (#666)

src/bacnet/datetime.h

@@ -6,9 +6,7 @@
  * @author Greg Shue <greg.shue@outlook.com>
  * @author Ondřej Hruška <ondra@ondrovo.com>
  * @date 2012
- * @section LICENSE
- *
- * SPDX-License-Identifier: MIT
+ * @copyright SPDX-License-Identifier: MIT
  */
 #ifndef BACNET_DATE_TIME_H
 #define BACNET_DATE_TIME_H