- don't assume that usb_descriptor_t has a field bDescriptorSubtype,
this field is class specific and shouldn't be there
- make fetch of hub descriptors in usbctl work (by setting the
correct request value)
- before reading a string descriptor, read the language table and
use a correct language code if possible
- install usbgen(8) manual, regen plist, bump
mostly from pkgsrc,
http://cvsweb.netbsd.org/bsdweb.cgi/pkgsrc/sysutils/usbutil/patches/patch-ab
