Port the remaining apps in sbin/ to utmpx; only reboot(8).

sbin/reboot/Makefile

@@ -2,8 +2,6 @@
 # $FreeBSD$
 
 PROG=	reboot
-DPADD=	${LIBULOG}
-LDADD=	-lulog
 MAN=	reboot.8 nextboot.8
 MLINKS=	reboot.8 halt.8 reboot.8 fastboot.8 reboot.8 fasthalt.8
 

sbin/reboot/reboot.c

@@ -54,9 +54,8 @@ __FBSDID("$FreeBSD$");
 #include <stdio.h>
 #include <stdlib.h>
 #include <string.h>
-#define _ULOG_POSIX_NAMES
-#include <ulog.h>
 #include <unistd.h>
+#include <utmpx.h>
 
 static void usage(void);
 static u_int get_pageins(void);