ACTION-643 Find previous WG discussion on this point

the point being, expired certificates and danger messages

I looked over the Oslo minutes and searched our public email archives. We 
discuss danger messages in some depth in: 

http://www.w3.org/2008/05/13-wsc-minutes.html

(search for "<Mez> issue-198? "; the agenda didn't seem to catch that as a 
sub item)

additionally, email discussion includes:

http://lists.w3.org/Archives/Public/public-wsc-wg/2007Jul/0130.html
http://lists.w3.org/Archives/Public/public-wsc-wg/2007Jul/0131.html