main/busybox: make sed -i check write status
upstream patch (not reviewed/merged yet, happy to wait a bit): http://lists.busybox.net/pipermail/busybox/2022-November/089964.html
I see 3.17.0_rc1 was made but we haven't branched yet, so this will make it into 3.17 if merged right? I'd personally be very glad if this made it, but happy to wait for branching if required.