Make shadow_logfd and Prog not extern

Closes #444
Closes #465

Signed-off-by: Serge Hallyn <serge@hallyn.com>

src/newusers.c

@@ -70,12 +70,12 @@
 #include "subordinateio.h"
 #endif				/* ENABLE_SUBIDS */
 #include "chkname.h"
+#include "shadowlog.h"
 
 /*
  * Global variables
  */
 const char *Prog;
-FILE *shadow_logfd = NULL;
 
 static bool rflg = false;	/* create a system account */
 #ifndef USE_PAM
@@ -1071,7 +1071,8 @@ int main (int argc, char **argv)
 #endif				/* USE_PAM */
 
 	Prog = Basename (argv[0]);
-	shadow_logfd = stderr;
+	log_set_progname(Prog);
+	log_set_logfd(stderr);
 
 	(void) setlocale (LC_ALL, "");
 	(void) bindtextdomain (PACKAGE, LOCALEDIR);