Add reboot/halt/poweroff/suspend commands to Finit API

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

src/util.h

@@ -28,9 +28,14 @@
 #ifdef HAVE_TERMIOS_H		/* for screen_width() */
 #include <poll.h>
 #include <stdio.h>
+#include <sys/reboot.h>
 #include <termios.h>
 #endif
 
+#ifndef RB_SW_SUSPEND /* Since Linux 2.5.18, but not in GLIBC until 2.19 */
+#define RB_SW_SUSPEND	0xd000fce2
+#endif
+
 extern int   screen_rows;
 extern int   screen_cols;
 extern char *prognm;