Update postfix to 3.1.2.

3.1.0

The main changes in no particular order are:

  * "postfix tls" command to simplify setup of opportunistic TLS,
    and to simplify SMTP server key/certificate management.

  * Positive and negative DNS reply TTL support in postscreen(8).

  * SASL AUTH rate limit in the Postfix SMTP server.

  * A safety limit on the number of address verify requests.

  * JSON-format Postfix queue listing.

  * Destination-independent delivery rate delay

For details, see the RELEASE_NOTES file.


3.1.1

Fixed in all supported releases:

  * The Milter "replace sender" (SMFIR_CHGFROM) request lost an
    address that was added with sender_bcc_maps, resulting in a
    "rcpt count mismatch" warning. Reported by Joerg Backschues.
    This defect was introduced with Postfix 2.6.

  * The "bad filetype" example in the header_checks(5) manpage
    falsely rejected Content- headers with ``name="example";
    x-apple-part-url="example.com"''.  Reported by Cedric Knight.
    This defect was introduced with Postfix 2.6.


3.1.2

Fixed with Postfix 3.1.2:

  * Changes to make Postfix build with OpenSSL 1.1.0.

Fixed with Postfix 3.1.2 and 3.0.6:

  * The makedefs script ignored readme_directory=pathname overrides.
    Fix by Todd C. Olson.

  * The tls_session_ticket_cipher documentation says that the default
    cipher for TLS session tickets is aes-256-cbc, but the implemented
    default was aes-128-cbc. Note that TLS session ticket keys are
    rotated after 1/2 hour, to limit the impact of attacks on session
    ticket keys.

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