+16. Expansion item ${listquote {<char} {<item>}}.
+
+17. An option for the ${readsocket {}{}{}} expansion to make the result data
+ cacheable.
+
+18. dkim_verify_min_keysizes, a list of minimum acceptable public-key sizes.
+
+19. bounce_message_file and warn_message_file are now expanded before use.