[whatwg] Nested optgroups

[Markus Ernst]

I found a message in the list archives from July 2004, where Ian 
announced to put nested optgroups back into the spec:
http://lists.whatwg.org/htdig.cgi/whatwg-whatwg.org/2004-July/001200.html
Anyway in the current spec, the optgroup element is not allowed inside 
another optgroup element:
http://www.whatwg.org/specs/web-apps/current-work/#the-optgroup-element

Has this been removed again since 2004? I did not find more on this in 
the list archives.

--
Markus