[css3-text] text-decoration-order

The CSS Text Decoration draft <http://dev.w3.org/csswg/css3-text-decor/>[1]
currently doesn't specify if the decoration should be shown in front of the
text or behind it.
Therefore I suggest adding a new property called text-decoration-order:

text-decoration-order: in-front | behind;

Sebastian

PS: Shouldn't mails regarding text decorations better have a label
[css3-text-decor]?

[1] http://dev.w3.org/csswg/css3-text-decor/