if_detached start dequeues mbufs on the start list and immediately frees them. IFQ_PURGE does that too, so let's reuse it here.
if_detached start dequeues mbufs on the start list and immediately
frees them. IFQ_PURGE does that too, so let's reuse it here.

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