Docs: Clarify external & service port in TCP/UDP services explanation.

[pvillaverde]

Following the changes on the previous PR #10220 I found the missing service port in the format confusing with the examples, as it seemed that the service name/port was to be used in the field of the PROXY keyword.

In my experience I've always needed to specify the service port and I thought this was required, but as it's currently stated in the documentation is an optional field, so I've kept it that way in the format syntax. Please correct me if I'm wrong.

What this PR does / why we need it:

Clarification of the documentation to the example provided.

Types of changes

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• CVE Report (Scanner found CVE and adding report)
• Breaking change (fix or feature that would cause existing functionality to change)
• Documentation only

Which issue/s this PR fixes

How Has This Been Tested?

Checklist:

• My change requires a change to the documentation.
• I have updated the documentation accordingly.
• I've read the CONTRIBUTION guide
• I have added unit and/or e2e tests to cover my changes.
• All new and existing tests passed.

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• ✅login: pvillaverde / (cb53b85)
• ✅login: pvillaverde / (cb53b85, ca342ea)

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[Gacko]

Have you checked if the service port is optional? Otherwise I'd use <> instead of [].

[pvillaverde]

Have you checked if the service port is optional? Otherwise I'd use <> instead of [].

Just tested it, it doesn't work without the service port. Changed to the required syntax <> !

[Gacko]

/triage accepted
/kind documentation
/priority backlog
/lgtm
/unhold

Thank you very much for your contribution!

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[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: Gacko, pvillaverde

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[Gacko]

/cherry-pick release-1.12

[Gacko]

/cherry-pick release-1.11

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[Gacko]

/cherry-pick release-1.10

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@Gacko: once the present PR merges, I will cherry-pick it on top of release-1.11 in a new PR and assign it to you.

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/cherry-pick release-1.11

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[k8s-infra-cherrypick-robot]

@Gacko: once the present PR merges, I will cherry-pick it on top of release-1.10 in a new PR and assign it to you.

In response to this:

/cherry-pick release-1.10

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[k8s-infra-cherrypick-robot]

@Gacko: new pull request created: #12192

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/cherry-pick release-1.12

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@Gacko: new pull request created: #12193

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[k8s-infra-cherrypick-robot]

@Gacko: new pull request created: #12194

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/cherry-pick release-1.10

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