Comment 3 for bug 1844573

Reviewed: https://review.opendev.org/683414
Committed: https://git.openstack.org/cgit/openstack/puppet-ironic/commit/?id=15eedd0c4c04a322c16e66aa8e75c8c93c017036
Submitter: Zuul
Branch: master

commit 15eedd0c4c04a322c16e66aa8e75c8c93c017036
Author: Harald Jensås <email address hidden>
Date: Thu Sep 19 09:02:16 2019 +0200

    Fix Inspector dnsmasq config for IPv6

    Extend and re-name the function ipv6_netmask_to_prefix() to
    ipv6_normalize_dnsmasq_ip_subnets(). It now changes the netmask
    to prefix and removes the 'gateway' if it is an IPv6 subnet.

    On IPv6 router info should be provided in router advertisements.
    There was a draft to add support in DHCPv6, but it was never
    completed.
    https://datatracker.ietf.org/doc/draft-ietf-mif-dhcpv6-route-option/

    Also:
      Add match for userclass iPXE and set option6:bootfile-url

    Closes-Bug: #1844573
    Change-Id: I47d88519acd18630e0d5682d93f1088771ec03a1