Use header-param in last webapps.cgi patch

extra/webapps/cgi/cgi.factor

@@ -31,7 +31,7 @@ SYMBOL: cgi-root
 
         "method" get >upper "REQUEST_METHOD" set
         "raw-query" get "QUERY_STRING" set
-	"Cookie" "header" get at "HTTP_COOKIE" set 
+	"Cookie" header-param "HTTP_COOKIE" set 
 
         "User-Agent" header-param "HTTP_USER_AGENT" set
         "Accept" header-param "HTTP_ACCEPT" set