Log message:
Pullup ticket #4780 - requested by taca
mail/postfix: security update

Revisions pulled up:
- mail/postfix/Makefile                                         1.284
- mail/postfix/distinfo                                         1.160
- mail/postfix/patches/patch-ai                                 1.33

---
   Module Name:	pkgsrc
   Committed By:	taca
   Date:		Wed Jul 22 00:25:37 UTC 2015

   Modified Files:
   	pkgsrc/mail/postfix: Makefile distinfo
   	pkgsrc/mail/postfix/patches: patch-ai

   Log message:
   Update postfix to 2.11.6, security release.

   With all supported Postfix releases, the default settings have been
   updated so that they no longer enable export-grade ciphers, and no
   longer enable the SSLv2 and SSLv3 protocols. These ciphers and
   protocols have little if any legitimate use today, and have instead
   become a vehicle for downgrade attacks. There are no other code
   changes.

   Postfix documentation has been updated to reflect the new default
   settings and their rationale; the RELEASE_NOTES give suggestions
   for how to enable the old ciphers and protocols if your infrastructure
   requires them.

   Finally, abandoning deprecated ciphers and protocols does not really
   improve TLS security without measures to better authenticate remote
   servers. Secure DNS and TLSA are steps in that direction.