avoid oversize bodies in bounces. The dafault value matches RFC
limits.
+ 9. New $initial_cwd expansion variable.
+
Version 4.86
------------
"aaaa" and "a" lookups is done and the full set of results returned.
14. New expansion variable $headers_added with content from ACL add_header
- modifier (but not yet added to messsage).
+ modifier (but not yet added to message).
15. New 8bitmime status logging option for received messages. Log field "M8S".