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Fixes #2008

MACs are 6-bytes long, not 8.

See https://github.com/earlephilhower/arduino-pico/pull/2001#issuecomment-1944461469

Remove the HW random generator call while initting LWIP to avoid the SDK
looping forver due to FreeRTOS exception/timer interrupts.

The `Picoprobe` example showing how to upload to Ubuntu is invalid because Ubuntu does not create or assign users to a `users` group (for many major releases, now). 

The reason the example worked is because the permissions were applied globally, rendering the `GROUP=users` assignment in the rule irrelevant. Hence, this assignment has been dropped.  

The `pico-debug` example has been updated similarly, but it uses a proper group-level rule, and Ubuntu does still use group `plugdev`. 

The reader thus has two good examples of creating `udev` rules.

WiFiMulti specifies a specific BSSID, in addition to the AP name and
password.  In the WiFi core the BSSID is stored as the raw 6-byte MAC
address, but the ESPHostedFG firmware expects a formatted C-String
(i.e. "ab:cd:ef:01:02:03" instead of {0xab, 0xcd, 0xef, 1, 2, 3})

Convert the raw bytes to the string format expected in the ESP FW.

Use the #define board name to identify when building for the
WIZnet W5100s-EVB-Pico and assign the proper pins and IRQs.

Fixes #1991

Correct buffer size to match Wire.h

Remove outdated(?) info

No polling needed and massively reduces latency by using the GPIO interrupt to
signal the Pico to read a received packet.  Also drops CPU load when no packets
are incoming.

Fixes #1983

Fixes #1973

The periodic LWIP pump/Ethernet packet reader async_context stopped
firing occasionally under high packet loads, causing the LWIP stack
to become unresponsive to any incoming data.

Re-implement the 2-step process for polling (like the CYW43 driver
from the RPI folks does) and undoes #1864 change.

All binaries should now be native on Apple silicon.

* Add native Apple ARM silicon M1/M2/M3 support

* Identify Mac ARM in download get.py script

Thanks to the ESP32 `get.py` sources!

* Rebuild M1 w/o using strip

Clocks were not being set at all after #1934.  Ensure they are by initting
to an impossible 0hz clock on creation and ::end

Fixes #1969

Adding Dude's Cab board (rp2040 based board for virtual pinball use)

Fixes #1919 by using binaries from https://github.com/earlephilhower/pico-quick-toolchain/pull/37

The Arduino WiFi normalization ended up calling the underlying LWIP
::config after the AP was begin, resulting in a failure to set the
IP configuration of the AP.  Move the _wifi.begin() call to after
the IP configuration is set.

Fixes #1989

* Adds definition for WIRE_INTERFACES_COUNT so those libraries which rely on it can detect and use...

Wire1. e.g. u8g2 will not use Wire1 unless this is (a) defined and (b) >1. This constant is defined
on other cores, e.g. for SAMD based boards.