def add_set_cookie *ck
			if ck.length > 0
				h = (@headers["Set-cookie"] ||= [])
				ck.each {|c| h << c}
			end
		end
def add_set_cookie *ck
			if ck.length > 0
				h = (@headers["Set-cookie"] ||= [])
				ck.each {|c| h << c}
			end
		end
Sugaring for Set-cookie headers. These are a pain because there can easily and
 legitimately be more than one. So we use an ugly verb to signify that.
 #add_set_cookies does NOT disturb the set-cookie headers which may have been
 added on a prior call. #set_cookie clears them out first.