Index: sys/kern/kern_shutdown.c
===================================================================
--- sys/kern/kern_shutdown.c
+++ sys/kern/kern_shutdown.c
@@ -134,6 +134,10 @@
 SYSCTL_INT(_kern, OID_AUTO, sync_on_panic, CTLFLAG_RWTUN,
 	&sync_on_panic, 0, "Do a sync before rebooting from a panic");
 
+static int poweroff_on_panic = 0;
+SYSCTL_INT(_kern, OID_AUTO, poweroff_on_panic, CTLFLAG_RWTUN,
+	&poweroff_on_panic, 0, "Do a power off instead of a reboot on a panic");
+
 static SYSCTL_NODE(_kern, OID_AUTO, shutdown, CTLFLAG_RW, 0,
     "Shutdown environment");
 
@@ -797,6 +801,8 @@
 	/* thread_unlock(td); */
 	if (!sync_on_panic)
 		bootopt |= RB_NOSYNC;
+	if (poweroff_on_panic)
+		bootopt |= RB_POWEROFF;
 	kern_reboot(bootopt);
 }