Bugfix/confirmed handlers empty service request (#885)

* Added reject in all confirmed service handlers, except GetEventInformation, when confirmed services with zero length occur which rejects with required parameters are missing message.

* Refactored errno use in service using debug_perror. Changed debug_perror usage to debug_fprintf. 

* Updated file and function headers in basic/service modules.

* Changed NDPU priority on confirmed messages to use requested NDPU priority.

* Renamed debug_aprintf to debug_printf_stdout for clarity.

* Convert most debug_fprintf usage to debug_print to reduce text bloat in AVR build

ports/bsd/dlmstp_port.c

@@ -1,10 +1,10 @@
-/**************************************************************************
- *
- * Copyright (C) 2008 Steve Karg <skarg@users.sourceforge.net>
- *
- * SPDX-License-Identifier: MIT
- *
- *********************************************************************/
+/**
+ * @file
+ * @brief Provides BSD-specific DataLink functions for MS/TP.
+ * @author Steve Karg <skarg@users.sourceforge.net>
+ * @date 2008
+ * @copyright SPDX-License-Identifier: GPL-2.0-or-later WITH GCC-exception-2.0
+ */
 #include <stdbool.h>
 #include <stdint.h>
 #include <stddef.h>
@@ -12,6 +12,7 @@
 #include <string.h>
 #include <stdio.h>
 #include <sys/time.h>
+#include <errno.h>
 /* BSD includes */
 #include <IOKit/serial/ioss.h>
 /* BACnet Stack defines - first */
@@ -29,9 +30,6 @@
 /* OS Specific include */
 #include "bacport.h"
 
-/** @file bsd/dlmstp_port.c  Provides BSD-specific DataLink functions for MS/TP.
- */
-
 #define BACNET_PDU_CONTROL_BYTE_OFFSET 1
 #define BACNET_DATA_EXPECTING_REPLY_BIT 2
 #define BACNET_DATA_EXPECTING_REPLY(control) \