xfer_window() function, which can return a scalar rather than a
boolean.

safe dropping of the netdev ref by the driver while other refs still
exist.

Add netdev_irq() method.  Net device open()/close() methods should no
longer enable or disable IRQs.

Remove rx_quota; it wasn't used anywhere and added too much complexity
to implementing correct interrupt-masking behaviour in pxe_undi.c.

not apply DHCP options in dhcp_configure_netdev().

provides them.

permanent processes, rather than requiring each one to have its own
initialisation function.

via UNDI API and also by ifstat command; may be useful for debugging.

Use generic fields in struct device_description rather than assuming
that the struct device * is contained within a pci_device or
isapnp_device; this assumption is broken when using the undionly
driver.

Add PXENV_UNDI_SET_STATION_ADDRESS.

(i.e. LSB transmitted first on the wire), even though SPI commands and
addresses always have to be big-endian.

DHCPD and Windows RIS in particular).

attempt at triggering TCP-related protocols to start).

structures.

DHCP still broken and #if 0'd out.

present; DHCP is broken).

UDP API.

implement sendto()/recvfrom() equivalents.

elsewhere as well.

request(), seek() or deliver_xxx() in order to start the data flow.
Autonomous generators must be genuinely autonomous (having their own
process), or otherwise arrange to be called.  TCP does this by
starting the retry timer immediately.

Add some debugging statements.