can't use NULL as a null character anymore

QnetDVAP.cpp

@@ -49,7 +49,7 @@
 #include "DStarDecode.h"
 #include "QnetDVAP.h"
 
-#define DVAP_VERSION "QnetDVAP-220429"
+#define DVAP_VERSION "QnetDVAP-20307"
 
 #define CALL_SIZE 8
 #define IP_SIZE 15
@@ -966,7 +966,7 @@ void CQnetDVAP::Run()
 int main(int argc, char *argv[])
 {
 	setvbuf(stdout, NULL, _IOLBF, 0);
-	printf("dvap_rptr VERSION %s\n", DVAP_VERSION);
+	printf("%s\n", DVAP_VERSION);
 
 	if (argc != 2)
 	{
@@ -976,9 +976,9 @@ int main(int argc, char *argv[])
 
 	if ('-' == argv[1][0])
 	{
-		printf("\nQnetDVAP Version #%s Copyright (C) 2018-2020 by Thomas A. Early N7TAE\n", DVAP_VERSION);
+		printf("%s Copyright (C) 2018-2020 by Thomas A. Early N7TAE\n", DVAP_VERSION);
 		printf("QnetDVAP comes with ABSOLUTELY NO WARRANTY; see the LICENSE for details.\n");
-		printf("This is free software, and you are welcome to distribute it\nunder certain conditions that are discussed in the LICENSE file.\n\n");
+		printf("This is free software, and you are welcome to distribute it\nunder certain conditions that are discussed in the LICENSE file.\nS");
 		return EXIT_SUCCESS;
 	}
 
@@ -993,7 +993,7 @@ int main(int argc, char *argv[])
 	int mod;
 	switch (*qn)
 	{
-	case NULL:
+	case 0:
 		mod = -1;
 		break;
 	case 'a':

QnetDVRPTR.cpp

@@ -40,7 +40,7 @@
 #include "DStarDecode.h"
 #include "QnetDVRPTR.h"
 
-#define DVRPTR_VERSION "QnetDVRPTR-526"
+#define DVRPTR_VERSION "QnetDVRPTR-20307"
 
 #define BAUD B115200
 #define IP_SIZE 15
@@ -1993,9 +1993,9 @@ int main(int argc, const char **argv)
 
 	if ('-' == argv[1][0])
 	{
-		printf("\nQnetDVRPTR Version #%s Copyright (C) 2018-2019 by Thomas A. Early N7TAE\n", DVRPTR_VERSION);
+		printf("%s Copyright (C) 2018-2019 by Thomas A. Early N7TAE\n", DVRPTR_VERSION);
 		printf("QnetDVRPTR comes with ABSOLUTELY NO WARRANTY; see the LICENSE for details.\n");
-		printf("This is free software, and you are welcome to distribute it\nunder certain conditions that are discussed in the LICENSE file.\n\n");
+		printf("This is free software, and you are welcome to distribute it\nunder certain conditions that are discussed in the LICENSE file.\n");
 		return 0;
 	}
 
@@ -2010,7 +2010,7 @@ int main(int argc, const char **argv)
 	int mod;
 	switch (*qn)
 	{
-	case NULL:
+	case 0:
 		mod = -1;
 		break;
 	case 'a':

QnetITAP.cpp

@@ -45,7 +45,7 @@
 #include "QnetConfigure.h"
 #include "Timer.h"
 
-#define ITAP_VERSION "QnetITAP-825"
+#define ITAP_VERSION "QnetITAP-20307"
 
 CQnetITAP::CQnetITAP(int mod)
 	: assigned_module(mod)
@@ -744,9 +744,9 @@ int main(int argc, const char **argv)
 
 	if ('-' == argv[1][0])
 	{
-		printf("\nQnetITAP Version #%s Copyright (C) 2018-2019 by Thomas A. Early N7TAE\n", ITAP_VERSION);
+		printf("%s Copyright (C) 2018-2019 by Thomas A. Early N7TAE\n", ITAP_VERSION);
 		printf("QnetITAP comes with ABSOLUTELY NO WARRANTY; see the LICENSE for details.\n");
-		printf("This is free software, and you are welcome to distribute it\nunder certain conditions that are discussed in the LICENSE file.\n\n");
+		printf("This is free software, and you are welcome to distribute it\nunder certain conditions that are discussed in the LICENSE file.\n");
 		return 0;
 	}
 
@@ -761,7 +761,7 @@ int main(int argc, const char **argv)
 	int assigned_module;
 	switch (*qn)
 	{
-	case NULL:
+	case 0:
 		assigned_module = -1;
 		break;
 	case 'a':

QnetModem.cpp

@@ -44,7 +44,7 @@
 #include "QnetModem.h"
 #include "QnetConfigure.h"
 
-#define MODEM_VERSION "QnetModem-708"
+#define MODEM_VERSION "QnetModem-20307"
 #define MAX_RESPONSES 30
 
 const unsigned char FRAME_START  = 0xE0U;
@@ -944,10 +944,10 @@ int main(int argc, const char **argv)
 
 	if ('-' == argv[1][0])
 	{
-		printf("\nQnetModem Version %s Copyright (C) 2019 by Thomas A. Early N7TAE\n", MODEM_VERSION);
+		printf("%s Copyright (C) 2019 by Thomas A. Early N7TAE\n", MODEM_VERSION);
 		printf("QnetModem comes with ABSOLUTELY NO WARRANTY; see the LICENSE for details.\n");
 		printf("This is free software, and you are welcome to distribute it\n");
-		printf("under certain conditions that are discussed in the LICENSE file.\n\n");
+		printf("under certain conditions that are discussed in the LICENSE file.\n");
 		return 0;
 	}
 
@@ -962,7 +962,7 @@ int main(int argc, const char **argv)
 	int assigned_module;
 	switch (*qn)
 	{
-	case NULL:
+	case 0:
 		assigned_module = -1;
 		break;
 	case 'a':

QnetRelay.cpp

@@ -36,7 +36,7 @@
 #include "QnetTypeDefs.h"
 #include "QnetConfigure.h"
 
-#define RELAY_VERSION "210420"
+#define RELAY_VERSION "QnetRelay-20307"
 
 CQnetRelay::CQnetRelay(int mod) :
 	assigned_module(mod),
@@ -453,9 +453,9 @@ int main(int argc, const char **argv)
 
 	if ('-' == argv[1][0])
 	{
-		printf("\nQnetRelay Version #%s Copyright (C) 2018-2021 by Thomas A. Early N7TAE\n", RELAY_VERSION);
+		printf("%s Copyright (C) 2018-2021 by Thomas A. Early N7TAE\n", RELAY_VERSION);
 		printf("QnetRelay comes with ABSOLUTELY NO WARRANTY; see the LICENSE for details.\n");
-		printf("This is free software, and you are welcome to distribute it\nunder certain conditions that are discussed in the LICENSE file.\n\n");
+		printf("This is free software, and you are welcome to distribute it\nunder certain conditions that are discussed in the LICENSE file.\n");
 		return 0;
 	}
 
@@ -469,7 +469,7 @@ int main(int argc, const char **argv)
 	int module;
 	switch (*qn)
 	{
-	case NULL:
+	case 0:
 		module = -1;
 		break;
 	case 'a':