Comment 15 for bug 1916428

Reviewed: https://review.opendev.org/c/openstack/neutron/+/836863
Committed: https://opendev.org/openstack/neutron/commit/35b8c8d56d175c27a9ecd05351b1ff390dac2a91
Submitter: "Zuul (22348)"
Branch: master

commit 35b8c8d56d175c27a9ecd05351b1ff390dac2a91
Author: elajkat <email address hidden>
Date: Tue Apr 5 19:27:48 2022 +0200

    Doc: Add warning for not supported Prefix Delegation

    Based on discussions during the Zed PTG (see [1]) mark Prefix Delegation
    as experimental.
    Add warning to cfg option ipv6_pd_enabled and to IPv6 documentation's
    PD section that the feature has low test coverage, and dibbler is
    concluded (the tool used for notifing Neutron that a prefix was changed)
    see: [2].

    [1]: https://etherpad.opendev.org/p/neutron-zed-ptg#L208
    [2]: https://github.com/tomaszmrugalski/dibbler#project-status

    Related-Bug: #1916428
    Change-Id: Ia712eb6f5b6f947aeab89ba7c018771eb4104e37