replacing umlaute and fixing address in headers Haldeneggsteig -> Universitaetsstrasse

Signed-off-by: Reto Achermann <reto.achermann@inf.ethz.ch>

Remove invoke_frame_identify, replaced with frame_identify().

This commit fully removes the Frame_Identify invocation and replaces the
calls with frame_identify().
Additionally, because the KCB is special, this commit introduces a new
invocation kcb_identify() which translates the lvaddr in the KCB
capability into the pysical address of the kernel control block.

Signed-off-by: Simon Gerber <simon.gerber@inf.ethz.ch>

devif: extended udp queue test to also measure time taken for enq/deq of
NIC queue

Signed-off-by: Roni Häcki <roni.haecki@inf.ethz.ch>

UDP queue: fixed setting up queue using endpoints

Signed-off-by: Roni Häcki <roni.haecki@inf.ethz.ch>

devif: prepared backend library to move backends

Signed-off-by: Roni Häcki <roni.haecki@inf.ethz.ch>

devif: added dst MAC lookup to UDP queue init

Signed-off-by: Roni Häcki <roni.haecki@inf.ethz.ch>

devif: udp queue simplified creation

- got src mac from hardware queue
- got src ip from dhcp service

Signed-off-by: Roni Häcki <roni.haecki@inf.ethz.ch>

devif: upd backend bugfix in valid_length computation

Signed-off-by: Roni Häcki <roni.haecki@inf.ethz.ch>

devif: refactored udp queue

- split udp queue into udp and ip queue
- ip queue contains protocols ip as well as ethernet
- upd queue now creates ip queue and builds on top of it

Signed-off-by: Roni Häcki <roni.haecki@inf.ethz.ch>

devif: prototype of UDP queue

Signed-off-by: Roni Häcki <roni.haecki@inf.ethz.ch>