UTMP: Set BOOT_TIME record and add shutdown

This patch adds support for initializing /var/run/utmp with the initial
reboot as well as a shutdown record in the UTMP db.

Also, the run level change now properly records ~ and ~~ as line and id,
respectively, and the kernel release and time of each UTMP record is now
set properly.

Signed-off-by: Joachim Nilsson <troglobit@gmail.com>

utmp-api.h

@@ -21,9 +21,11 @@
  * THE SOFTWARE.
  */
 
-int utmp_set (int type, int pid, char *user);
+int utmp_set         (int type, int pid, char *user, char *line, char *id);
+int utmp_set_boot    (void);
+int utmp_set_halt    (void);
 int utmp_set_runlevel(int pre, int now);
-int utmp_show(char *file);
+int utmp_show        (char *file);
 
 /**
  * Local Variables: