- Remove useless includes
- Add WARNS?= 6 to Makefile

Reported By: Liam J. Foy
Index: src/usr.bin/logname/logname.c
===================================================================
--- src/usr.bin/logname/logname.c	(revision 131)
+++ src/usr.bin/logname/logname.c	(working copy)
@@ -44,11 +44,9 @@
 __FBSDID("$FreeBSD: src/usr.bin/logname/logname.c,v 1.7 2002/09/04 23:29:03 dwmalone Exp $");
 
 #include <err.h>
-#include <errno.h>
 #include <unistd.h>
 #include <stdio.h>
 #include <stdlib.h>
-#include <string.h>
 
 void usage(void);
 
Index: src/usr.bin/logname/Makefile
===================================================================
--- src/usr.bin/logname/Makefile	(revision 131)
+++ src/usr.bin/logname/Makefile	(working copy)
@@ -2,5 +2,6 @@
 # $FreeBSD: src/usr.bin/logname/Makefile,v 1.4 2002/02/08 22:31:41 markm Exp $
 
 PROG=	logname
+WARNS?= 6
 
 .include <bsd.prog.mk>