Make shadow_logfd and Prog not extern

Closes #444
Closes #465

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

src/login.c

@@ -53,6 +53,7 @@
 #include "pwauth.h"
 /*@-exitarg@*/
 #include "exitcodes.h"
+#include "shadowlog.h"
 
 #ifdef USE_PAM
 #include "pam_defs.h"
@@ -83,7 +84,6 @@ static pam_handle_t *pamh = NULL;
  * Global variables
  */
 const char *Prog;
-FILE *shadow_logfd = NULL;
 
 static const char *hostname = "";
 static /*@null@*/ /*@only@*/char *username = NULL;
@@ -578,7 +578,8 @@ int main (int argc, char **argv)
 
 	amroot = (getuid () == 0);
 	Prog = Basename (argv[0]);
-	shadow_logfd = stderr;
+	log_set_progname(Prog);
+	log_set_logfd(stderr);
 
 	if (geteuid() != 0) {
 		fprintf (stderr, _("%s: Cannot possibly work without effective root\n"), Prog);