Postfix was updated to version 2.11.3 to bring features and bugfixes.

Changes done:
- postfix 2.11.3:
* Fix for configurations that prepend message headers with Postfix
access maps, policy servers or Milter applications. Postfix now
hides its own Received: header from Milters and exposes prepended
headers to Milters, regardless of the mechanism used to prepend
a header. This fix reverts a partial solution that was released
on October 13, 2014, and replaces it with a complete solution.
* Portability fix for MacOS X 10.7.x (Darwin 11.x) build procedure.

- postfix 2.11.2:
* Fix for DMARC implementations based on SPF policy plus DKIM
Milter. The PREPEND access/policy action added headers ABOVE
Postfix's own Received: header, exposing Postfix's own Received:
header to Milters (protocol violation) and hiding the PREPENDed
header from Milters. PREPENDed headers are now added BELOW
Postfix's own Received: header and remain visible to Milters.
* The Postfix SMTP server logged an incorrect client name in
reject messages for check_reverse_client_hostname_access and
check_reverse_client_hostname_{mx,ns}_access. They replied with
the verified client name, instead of the name that was rejected.
* The qmqpd daemon crashed with null pointer bug when logging a
lost connection while not in a mail transaction.

- postfix 2.11.1:
* With connection caching enabled (the default), recipients could
be given to the wrong mail server.
* Enforce TLS when TLSA records exist, but all are unusable.
* Don't leak memory when TLSA records exist, but all are unusable.
* Prepend "-I. -I../../include" to the compiler command-line
options, to avoid name clashes with non-Postfix header files.
* documentation fixes
* logging fixes

Other bugfixes done:
- bnc#914086 syntax error in config.postfix
- Adapt config.postfix to be able to run on SLE11 too.

- Don't install sysvinit script when systemd is used
- Make explicit PreReq dependencies conditional only for older
systems
- Don't try to set explicit attributes to symlinks
- Cleanup spec file vith spec-cleaner

- bnc#912594 config.postfix creates config based on old options

- bnc#911806 config.postfix does not set up correct saslauthd socket directory for chroot
- bnc#910265 config.postfix does not upgrade the chroot
- bnc#908003 wrong access rights on /usr/sbin/postdrop causes
permission denied when trying to send a mail as non root user
- bnc#729154 wrong permissions for some postfix components

- restore previously lost fix:
Fri Oct 11 13:32:32 UTC 2013 - matz@suse.de
- Ignore errors in %pre/%post.