JH/18 Bug 1581: Router and transport options headers_add/remove can
now have the list separator specified.
+JH/19 Bug 392: spamd_address, and clamd av_scanner, now support retry
+ option values.
+
+JH/20 BUG 1571: Ensure that $tls_in_peerdn is set, when verification fails
+ under OpenSSL.
+
Exim version 4.85