Update to OpenSMTPD 5.3.2p1

release-5.3.2.txt:
This is a bugfix and reliability release mostly, with few new features.
Features:
=========
  * add support for transparent queue compression
  * fsqueue now keeps a safety disk space / inode 5% reserve
  * add SECURE and AUTH transmission type as specified in rfc3848
  * add db(3) support for "helo" lookups
  * make "source" no longer required for "helo" lookups
  * add check to ensure smtpd and smtpctl are "compatible"
  * add new "error" alias kind to have an alias return 4xx or 5xx
  * source and session are now logged when relaying
  * make OpenSMTPD cope gracefully with many former "fatal" cases
  * detect and cope with "corrupted" envelopes at runtime
  * smtpd -d no longer implies "debug" logging
  * smtpd -v no longer requires -d to output debug logging
  * traces no longer require -dv and can be (de)activated at runtime
  * add support for Unix sockets in local LMTP deliveries
    contributed by Gleb Kozyrev <gleb@gkoz.com>
BugFixes:
=========
  * fix logic error in our SSL layer causing possible DoS [1]
  * fix delivery_lmtp issues when dealing with multi-response LHLO
  * do not replace '/' with ':' in user.directory token
  * do not reject [IPv6:...] notation in clients HELO commands
  * do not close session on *recipient* temporary failures
  * fix possible spin when admin messes with queue perms at runtime
  * fix a bug where offline mails are not enqueued unless sent by root
  * support + as user-part "directory" separator in virtual domains
  * fix "reject" rules when used with senders
  * fix mbox deliveries when dealing with bounces
  * fix smtp-level sender rewriting when dealing with bounces
  * lowercase keys before performing table lookups
  * fix MTA to cope with reaching a limit on a MX
  * assorted minor bug fixes, memleak plugs and improvements
  * existing but empty ~/.forward should skip expansion
    contributed by "Naabed"
[1] bug exists in both native and portable version but DoS doesn't
    seem to trigger on OpenBSD. you should update still.