[whatwg] required attribute in label

[Brenton Strine]

> <label class="required">

and

> <input id="name1" type="text" required><span> </span>

are effective, but then again this would be too:

...</label>*

It just seems a shame that we have this neat attribute that indicates
required controls, but we can't actually use it to change the
presentation adding additional code.

Brenton