🐛 Update httpd.conf.j2

[owenthomas17]

What this PR does / why we need it: The current Listen directive does not work on systems that have ipv6 disabled. The Apache Listen directive supports Listen <port> syntax at which point it seems to be able to listen correctly on both dual stack and ipv4 only systems. See https://httpd.apache.org/docs/2.4/bind.html for more details.

Which issue(s) this PR fixes (optional, in fixes #<issue number>(, fixes #<issue_number>, ...) format, will close the issue(s) when PR gets merged): Fixes #531

[metal3-io-bot]

Hi @owenthomas17. Thanks for your PR.

I'm waiting for a metal3-io member to verify that this patch is reasonable to test. If it is, they should reply with /ok-to-test on its own line. Until that is done, I will not automatically test new commits in this PR, but the usual testing commands by org members will still work. Regular contributors should join the org to skip this step.

Once the patch is verified, the new status will be reflected by the ok-to-test label.

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[mboukhalfa]

/ok-to-test

[mboukhalfa]

Can you please sign the commit to fix the DCO ? and run tests ?

[mboukhalfa]

/test metal3-centos-e2e-integration-test-main metal3-ubuntu-e2e-integration-test-main

[iurygregory]

/lgtm issue in the job doesn't seem related

[dtantsur]

/approve

[metal3-io-bot]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: dtantsur

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Needs approval from an approver in each of these files: - ~~[OWNERS](https://github.com/metal3-io/ironic-image/blob/main/OWNERS)~~ [dtantsur] Approvers can indicate their approval by writing `/approve` in a comment Approvers can cancel approval by writing `/approve cancel` in a comment

[mboukhalfa]

failed because of http issue when installing packages /test metal3-ubuntu-e2e-integration-test-main

[mboukhalfa]

/lgtm

[metal3-io-bot]

@mboukhalfa: adding LGTM is restricted to approvers and reviewers in OWNERS files.

In response to [this](https://github.com/metal3-io/ironic-image/pull/532#issuecomment-2245336541): >/lgtm Instructions for interacting with me using PR comments are available [here](https://git.k8s.io/community/contributors/guide/pull-requests.md). If you have questions or suggestions related to my behavior, please file an issue against the [kubernetes-sigs/prow](https://github.com/kubernetes-sigs/prow/issues/new?title=Prow%20issue:) repository.

[mboukhalfa]

@iurygregory Can you please re-lgtm I do not have this permission on this repo ? cc @Rozzii

[iurygregory]

/lgtm