Comment 4 for bug 1454332

Reviewed: https://review.openstack.org/188338
Committed: https://git.openstack.org/cgit/openstack/ironic/commit/?id=c55b15cc0ab2ab7cbdcec25fa4d7e446912341c7
Submitter: Jenkins
Branch: stable/kilo

commit c55b15cc0ab2ab7cbdcec25fa4d7e446912341c7
Author: Lucas Alvares Gomes <email address hidden>
Date: Tue May 12 17:53:24 2015 +0100

    Fix chainloading iPXE (undionly.kpxe)

    This patch is making the neutron DHCP provider to explicitly check if
    the request is coming from iPXE before ACK'ing the PXE request with the
    iPXE script (When iPXE is enabled only).

    Also, update the documentation that explains how to configure neutron
    for iPXE to create the "ipxe" tag based on the DHCP user class or DHCP
    option 175 (as before).

    Conflicts:
     doc/source/deploy/install-guide.rst

    Change-Id: I60f9f515a9bd45aed6b2f6f9165a2f85259b3879
    Closes-Bug: #1454332
    (cherry picked from commit 4ec47b66602b4eb0b86ffd1fd69b70ef2bf16a25)