[whatwg] WF2: required attribute clarification requested

[Alex Vincent]

"For disabled or readonly controls, the (required) attribute has no effect."

What does this mean?  The missingValue bit of validityState is either
on or off.  Do I need to change the required bit if we're disabled?
Or should I leave it alone?

-- 
"The first step in confirming there is a bug in someone else's work is
confirming there are no bugs in your own."
-- Alexander J. Vincent, June 30, 2001