I don't see any mention of kbd.c on the linked page. Are you referring to this section?:
Test neededEdit
Camera boots, can switch to rec mode, shoot, keys etc work normally in when not in alt mode.
Alt mode CHDK menu navigation, jogdial work as expected
Scripted key presses, jogdial work as expected. ubtest.bas test script can be used to check scripted keypresses
USB Remote functionality - a basic plug test as described on the Testing page should be sufficient.
Enable Remote [ * ]
Switch Type [ OnePush ]
Control Type [ Normal ]