server now automatically includes the mail proc name in the log() output).
Outbound listserver messages now have the SMTP reverse-path (translated to
Return-Path header) set to the list server's address (so bounces will go there
instead of to the author of the original message).
The outbound messages now have an agent-type of "PROCESS" which will be used
to allow this script to process bounce messages in the near future (and remove
invalid e-mail addresses from the subscription list).