[Toybox] reboot: signal init, add -f to bypass

[Isaac Dunham]

On Sat, Mar 28, 2015 at 08:02:04PM +0000, Isaac Dunham wrote:
> reboot: signal init, add -f option to call reboot();
> init: use SIGINT, use xsignal()
> 
> Now that oneit supports the same signals as our "sysv"-init for shutdown,
> make reboot et al. signal pid 1 with the appropriate signal.
> Of these signals, only SIGINT works with sysvinit 2.88, causing a reboot.
> The others are only supported in Busybox init.
> 
> Also, make init accept SIGINT and use xsignal().

Ping.

Thanks,
Isaac Dunham