Log Message:
postfix: Update to 3.6.4

upstream changes:
-----------------
 Fixed in Postfix 3.6.4, 3.5.14, 3.4.24, 3.3.21:
  o Bug introduced in bugfix 20210708: duplicate bounce_notice_recipient
    entries in postconf output. This was caused by an incomplete fix to send
    SMTP session transcripts to $bounce_notice_recipient. Reported by Vincent
    Lefevre.
  o Bug introduced in Postfix 3.0: the proxymap daemon did not automatically
    authorize proxied maps inside pipemap (example:
    pipemap:{proxy:maptype:mapname, ...}) or inside unionmap. Problem reported
    by Mirko Vogt.
  o Bug introduced in Postfix 2.5: off-by-one error while writing a string
    terminator. This code passed all memory corruption tests, presumably
    because it wrote over an alignment padding byte, or over an adjacent
    character byte that was never read. Reported by Robert Siemer.

Fixed in Postfix 3.6.4, 3.5.14, 3.4.24:
  o The proxymap daemon did not automatically authorize map features added
    after Postfix 3.3, caused by missing *_maps parameter names in the
    proxy_read_maps default value. Found during code maintenance.