JH/10 Add 8bitmime log_selector, for 8bitmime status on the received line.
Pulled from Bugzilla 817 by Wolfgang Breyha.
+JH/11 Add $router_name and $transport_name variables. Bugzilla 308.
+
PP/11 SECURITY: protect DKIM DNS decoding from remote exploit.
CVE-2012-5671