[css3-background] border-break and border styles

Brad Kemper wrote in http://lists.w3.org/Archives/Public/www-style/2009Feb/0017.html
 >
 > By the way, I can't really imagine setting a non-none value of color or
 > width that did not match that of the relevant edge of the element as a
 > whole. It seems to me that there should just be two values for
 > border-break: none or each-box.

I can imagine each of 'none', 'close', and 'hidden' being quite useful.
<border-style> etc. was added in for effects like
   border: solid medium black;
   border-break: thin dashed gray;

If we wanted to remove that functionality, we could have

   border-break: open | close | pad

Thoughts?

~fantasai