debian/apt.cron.daily: show apt-auth-failure.note on auth failure in the night cron job

debian/apt.cron.daily

@@ -182,7 +182,7 @@ fi
 
 UPDATE_STAMP=/var/lib/apt/periodic/update-stamp
 if check_stamp $UPDATE_STAMP $UpdateInterval; then
-    if apt-get -qq update 2>/dev/null; then
+    if apt-get -qq update -o APT::Update::Auth-Failure::="cp /usr/share/apt/apt-auth-failure.note /var/lib/update-notifier/user.d/" 2>/dev/null; then 
 	# Could possible test access to '/var/run/dbus/system_bus_socket' has well,
 	# but I'm not sure how stable the internal pipe location is defined as
 	# being;  so for the moment just 2>/dev/null . --sladen 2007-09-27