- acs_mail_lite::send_immediately: new switch for "-force_delivery_mode"
to force delivery mode for a single call (ignoring package parameter
"EmailDeliveryMode")
- New potential value for "EmailDeliveryMode": "nssmtpd"
When this parameter is specified, the behavior is like
"smtp", but the code tries use the SMTP implementation
of the nssmtpd NaviServer module.
- It is also possible to combine "nssmtpd" with the delivery methods
"filter" or "redirect" simply by writing e.g. "filter nssmtpd"
- some refactoring to avoid repeated code