log, conf, tap: Define die() as err() plus exit(), drop cppcheck workarounds

If we define die() as a variadic macro, passing __VA_ARGS__ to err(),
and calling exit() outside err() itself, we can drop the workarounds
introduced in commit 36f0199f6e ("conf, tap: Silence two false
positive invalidFunctionArg from cppcheck").

Suggested-by: David Gibson <david@gibson.dropbear.id.au>
Signed-off-by: Stefano Brivio <sbrivio@redhat.com>
Reviewed-by: David Gibson <david@gibson.dropbear.id.au>

log.h

@@ -10,12 +10,17 @@
 #define LOGFILE_CUT_RATIO		30	/* When full, cut ~30% size */
 #define LOGFILE_SIZE_MIN		(5UL * MAX(BUFSIZ, PAGE_SIZE))
 
-void die(const char *format, ...);
 void err(const char *format, ...);
 void warn(const char *format, ...);
 void info(const char *format, ...);
 void debug(const char *format, ...);
 
+#define die(...)							\
+	do {								\
+		err(__VA_ARGS__);					\
+		exit(EXIT_FAILURE);					\
+	} while (0)
+
 extern int log_trace;
 void trace_init(int enable);
 #define trace(...)							\