Comment 4 for bug 1045828

Reviewed: https://review.openstack.org/12397
Committed: http://github.com/openstack/quantum/commit/6fa761fd14f634d4194eaa8cd64dbfc1821aac30
Submitter: Jenkins
Branch: master

commit 6fa761fd14f634d4194eaa8cd64dbfc1821aac30
Author: Mark McClain <email address hidden>
Date: Wed Sep 5 00:52:21 2012 -0400

    restart dnsmasq when subnet cidr set changes

    fixes bug 1045828

    The original bug occurred because the set of subnet cidrs changed
    without a restart of dnsmasq. As a result, dnsmasq would not respond
    with offers for fixed_ips assigned in the unknown cidr ranges even when
    the underlying host file had properly updated.

    This patch addresses the bug by restarting dnsmasq when the set of
    subnet cidrs changes. When the set does not change, it will reload the
    options and allocations.

    Change-Id: I0e257208750703f4a32c51d1323786e76e676bb6