Comment 4 for bug 1538268

Reviewed: https://review.openstack.org/275768
Committed: https://git.openstack.org/cgit/openstack/openstack-ansible-security/commit/?id=945bd869f428433d50fefaf523633ac76b699335
Submitter: Jenkins
Branch: master

commit 945bd869f428433d50fefaf523633ac76b699335
Author: Major Hayden <email address hidden>
Date: Wed Feb 3 09:37:37 2016 -0600

    Fix Postfix mynetworks if IPv6 is disabled

    If a deployer sets disable_ipv6 = yes, we should ensure that the
    mynetworks directive in /etc/postfix/main.cf contains only IPv4
    addresses. The `newalias` command fails if IPv6 addresses appear
    in mynetworks but IPv6 is disable system-wide.

    Closes-bug: 1538268
    Change-Id: I45f09d631e9b81554f8463851143fd27c9f51ead