kern/41780: boot -c (userconf) does not work with USB keyboard

[achowe%snert.com@localhost]

>Number:         41780
>Category:       kern
>Synopsis:       boot -c (userconf) does not work with USB keyboard
>Confidential:   no
>Severity:       serious
>Priority:       medium
>Responsible:    kern-bug-people
>State:          open
>Class:          sw-bug
>Submitter-Id:   net
>Arrival-Date:   Sat Jul 25 09:55:00 +0000 2009
>Originator:     Anthony Howe
>Release:        5.0
>Organization:
SnertSoft
>Environment:
i386, USB keyboard, USB mouse, realtek 8139C, onboard AGP VGA, USB legacy DOS 
support enabled in BIOS
>Description:
While trying to resolve "rtk0: watchdog timer" issue through boot time 
configuration using "boot -c", once in userconf the USB keyboard input was 
unavailable. 

As USB keyboards become the norm, userconf needs to be able to enable enough of 
the USB framework to enable a USB keyboard. I had to borrow a PS2 keyboard from 
a friend in order to use "boot -c" at all.
>How-To-Repeat:
1. Connect USB keyboard.
2. Insure USB legacy support enabled in BIOS.
3. Drop to NetBSD boot prompt.
4. Type: boot -c
5. At uc> prompt attempt to type input on USB keyboard.

>Fix: