Comment 4 for bug 1438819

Reviewed: https://review.openstack.org/167784
Committed: https://git.openstack.org/cgit/openstack/neutron/commit/?id=1bfd86e1ef7148370798aa99c868d7f931fcbf78
Submitter: Jenkins
Branch: master

commit 1bfd86e1ef7148370798aa99c868d7f931fcbf78
Author: Andrew Boik <email address hidden>
Date: Wed Mar 25 16:05:41 2015 -0400

    Limit router gw ports' stateful fixed IPs to one per address family

    Validate a router's gateway port during a router update by ensuring
    it has no more than one v4 fixed IP and one v6 (statefully-assigned)
    fixed IP.

    Note that there is no limit on v6 addresses from SLAAC and
    DHCPv6-stateless subnets as they are automatically allocated.

    Change-Id: I6a328048b99af39ab9497fd9f265d1a9b95b7148
    Closes-Bug: 1438819
    Partially-implements: blueprint multiple-ipv6-prefixes