* internal transceiver needs to be reset for the BMSR_LINK bit to
be even remotely reliable
* because of previous, maintain link state, so we won't be sensing speed
all the time when interface flags need to be changed (e.g. entering/exiting
promiscuous mode)
* in auto-speed mode, report link condition changes on the console
directly, call the function pointer (*if_input)(ifp, m). The input routine
expects the packet header to be at the head of the packet, and will adjust
as necessary. Privatize the layer 2 input and output routines, allowing
*_ifattach() to set them up as appropriate.
pk