[smtpd/qpsmtpd] 7ff453: Fix dmarc reject (#260)

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  Branch: refs/heads/master
  Home:   https://github.com/smtpd/qpsmtpd
  Commit: 7ff45375f1ca1208dd9173973a123178ddbdea59
      https://github.com/smtpd/qpsmtpd/commit/7ff45375f1ca1208dd9173973a123178ddbdea59
  Author: Daniel B <[email protected]>
  Date:   2016-05-03 (Tue, 03 May 2016)

  Changed paths:
    M plugins/dmarc

  Log Message:
  -----------
  Fix dmarc reject (#260)

* Update data_post_headers documentation
We cannot reject at this stage, which is only there to alter headers.
Fix #258

* DMARC plugin: reject in data_post
Followup of #258: we cannot reject a connection during data_post_headers. So add a new hook in data_post to do the real rejection

* Add the dmarc_reject note on the transaction
It's probably possible to have one valid email after an invalid one using the same connection (even if not common)



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