- Milter support
- Ability to modify the body of email
    - Done for banners. Modifying the rest, not so much.
- Plugins to copy from Qpsmtpd:
  - dspam

Outbound improvements
 - Provide better command line tools for manipulating/inspecting the queue
 - Add the ability to force a run on a specific queue file or destination domain
 - Make retry times configurable (handle RFC requirements for 5 days and DSN queued warnings)
 - Disable deliveries for a domain

Plugin behavior changes
 - in SpamAssassin plugin, change default behavior of 'legacy' status header.
   Presently, when undefined, legacy is used. Legacy support should be changed to
   only when requested, with a sunset date.
 - data.uribl; expand short URLs before lookups, add support for uri-a (sbl.spamhaus.org), uri-ns, uri-ns-a lookup types.


Remove the following deprecated plugins
 - rdns.regexp
 - data.nomsgid         (subsumed into data.headers.js)
 - data.noreceived               ""
 - data.rfc5322_header_checks    ""
 - daemonize
 - mail_from.nobounces  (subsumed into bounce.js)
 - mail_from.blocklist
 - rcpt_to.blocklist
 - lookup_rdns_strict
 - mail_from.access     (replaced by access.js)
 - rcpt_to.access                 ""
 - connect.rdns_access            ""
 - relay_acl            (replaced by relay.js)
 - relay_all                      ""
 - relay_force_routing            ""

Move the following plugins:
 - test_queue   -> queue/test_queue

Built-in HTTP server
- uses the same TLS/SSL certs as smtpd
- auth against SMTP-AUTH provider

Update tests to detect HARAKA_NETWORK_TESTS and skip network tests unless it's set
  (to prevent annoying test suite failures that are tangential to Haraka)
