Call-out ports renamed cuadX -> cuauX -- when?

[Boris Samorodov]

11.10.2016 01:52, Polytropon пишет:

> On my FreeBSD 8 home system, "man 4 sio" contains the following
> convention in the FILES section:

Just a note. Those are two different device drivers: sio and uart.
It's UART(4) that uses the 'u' notation for cua (call-up asynchronous)
ports.

I guess, my question may be transformed to "when did the UART driver
become the default". (may be around 7->8)?

-- 
WBR, bsam