Reject USB requests that could damage the bus integrity, just like it is done in ugen(4).
Reject USB requests that could damage the bus integrity, just like it
is done in ugen(4).

Found by Grant Czajkowski during the GSoC 2015.

orumin/openbsd-efivars,orumin/openbsd-efivars,orumin/openbsd-efivars,orumin/openbsd-efivars