Copy head (r256279) to stable/10 as part of the 10.0-RELEASE cycle.Approved by: re (implicit)Sponsored by: The FreeBSD Foundation
Initial version of libusbboot, a fully stand-alone, single threaded andfunctional compilation of the FreeBSD USB stack for use with boot loadersand such.Discussed with: Hiroki Sato, hrs @ EuroBSDCon