Log Message:
Update postfix to 2.11.1.

Bugfixes (fixed in Postfix 2.11 and Postfix 2.12):

  * With connection caching enabled (the default), recipients could
    be given to the wrong mail server. The root cause was an incorrect
    predicate. Due to this, the Postfix SMTP client could under
    rare conditions save and restore plaintext connections that
    should not be cached, under a fixed lookup key that did not
    distinguish by destination.  Problem reported by Sahil Tandon.

  * Enforce TLS when TLSA records exist, but all are unusable.

  * Don't leak memory when TLSA records exist, but all are unusable.

Workarounds:

  * Prepend "-I. -I../../include" to the compiler command-line
    options, to avoid name clashes with non-Postfix header files.

Documentation cleanup:

  * Corrected postconf(1) manpage for missing version attribution
    and incorrect "author" formatting.

  * The documentation for Postfix > 2.8 TLS activity logging was
    incorrect. Loglevel 0 produces no logging. Instead, information
    is logged only with loglevel 1 or higher.

Logging cleanup:

  * The TLS client logged that an "Untrusted" TLS connection was
    established instead of "Anonymous".

  * For consistency, TLS policy lookup errors are now logged as
    warnings.