Highlighted commits:
- rtwn: add support for the RTL8723BU
- rc: add a backlight service to save/restore backlight levels
- sys/conf/options: Add WITNESS_LOCK_CHILDCOUNT
- iflib: Plumb per-packet RX hardware timestamps to mbufs
- ifconfig: Add SR-IOV VF status output
- Introduce nfsdtop(8)
/root 