Log Message:
mail/postfix: update to 3.5.1

Update postfix to 3.5.1.

3.5.0 (2020-03-16)

Postfix stable release 3.5.0 is available. Support has ended for
legacy release Postfix 3.1.

The main changes are below. See the RELEASE_NOTES file for further details.

  * Support for the haproxy v2 protocol. The Postfix implementation
    supports TCP over IPv4 and IPv6, as well as non-proxied
    connections; the latter are typically used for heartbeat tests.

  * Support to force-expire email messages. This introduces new
    postsuper(1) command-line options to request expiration, and
    additional information in mailq(1) or postqueue(1) output.

  * The Postfix SMTP and LMTP client support a list of nexthop
    destinations separated by comma or whitespace. These destinations
    will be tried in the specified order. Examples:

    /etc/postfix/main.cf:
        relayhost = foo.example, bar.example
        default_transport = smtp:foo.example, bar.example

Incompatible changes:

  * Logging: Postfix daemon processes now log the from= and to=
    addresses in external (quoted) form in non-debug logging (info,
    warning, etc.). This means that when an address localpart
    contains spaces or other special characters, the localpart will
    be quoted, for example:

	from=<"name with spaces"@example.com>

    Specify "info_log_address_format = internal" for backwards \ 
compatibility.

  * Postfix now normalizes IP addresses received with XCLIENT,
    XFORWARD, or with the HaProxy protocol, for consistency with
    direct connections to Postfix. This may change the appearance
    of logging, and the way that check_client_access will match
    subnets of an IPv6 address.

3.5.1 (2020-04-20)

Postfix versions 3.5.1, 3.4.11, 3.3.9, 3.2.14:

  * Bitrot workaround for broken builds after an incompatible change
    in GCC 10.

  * Bitrot workaround for broken DANE/DNSSEC support after an
    incompatible change in GLIBC 2.31. This change avoids the need
    for new options in /etc/resolv.conf.