Chore/bacnet-sc-unrelated-cleanup (#620)

* Added required linux Ethernet library for ethernet build

* Added .obj to gitignore

* Fixed BACnet port for APPLE to use BSD in CMake

* Changed format in CMake to enable cleaner SC merge

* Added create-object and delete-object recipes in GCC Makefile

* Added datalink timer to all example OS apps

* Changed most microcontroller ports to use BACAPP_MINIMAL to specify which datatypes can be written.

* Fixed zephyr OS for BACnet/IP warning

* Fixed zephyr OS log to not require log_strdup

* Added writefile API to file object example

* Added API to device-client to make it more robust.

* Added API in network-port object for getting the ASCII object-name

* Added debug print with a timestamp option

* Added debug print with hex dump print

* Added API to network port object for activate and discard

* Added default define for debug with timestamp

* Added prototype in header for disabled debug printf.

* Added fifo peek ahead function to peek at more than one byte.

* Added get-mac value for network port that uses buffer rather than octetstring

src/bacnet/basic/sys/debug.h

@@ -34,6 +34,10 @@
 #define DEBUG_ENABLED 0
 #endif
 
+#ifndef DEBUG_PRINTF_WITH_TIMESTAMP
+#define DEBUG_PRINTF_WITH_TIMESTAMP 0
+#endif
+
 #ifdef __cplusplus
 extern "C" {
 #endif /* __cplusplus */
@@ -55,17 +59,18 @@ extern "C" {
     void debug_perror(
         const char *format,
         ...);
-#if DEBUG_ENABLED
-    /* Nothing more here */
-#else
-    /* If your compiler supports it, this is more compact:
-       inline void debug_printf(
-       const char *format,
-       ...) {
-       format = format;
-       }
-     */
-#endif
+    BACNET_STACK_EXPORT
+    void debug_printf_hex(
+        uint32_t offset,
+        const uint8_t *buffer,
+        size_t buffer_length,
+        const char *format, ...);
+
+    BACNET_STACK_EXPORT
+    void debug_printf_disabled(
+        const char *format,
+        ...);
+
 #ifdef __cplusplus
 }
 #endif /* __cplusplus */