Improve documentation about rfc2136 TTLs

[stefanlasiewski]

Now that --rfc2136-min-ttl is an option, show how to set it and also how to override it using an annotation.

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[k8s-ci-robot]

Welcome @stefanlasiewski!

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[sheerun]

@stefanlasiewski Could you accept CLA?

[stefanlasiewski]

I need to get approval before I can sign the agreement, and I hope that will happen soon.

[JoaoBraveCoding]

I think you have a typo in the name of the MR, rfc2126 -> rfc2136

[stefanlasiewski]

I need to get approval before I can sign the agreement, and I hope that will happen soon.

Just FYI, I am still waiting for approval.

[stefanlasiewski]

I think you have a typo in the name of the MR, rfc2126 -> rfc2136

Thank you for catching that. Fixed.

[seanmalloy]

@stefanlasiewski any luck getting the CLA signed?

[stefanlasiewski]

No, not yet, unfortunately.

[seanmalloy]

No, not yet, unfortunately.

@stefanlasiewski let me know if there is anything I can do to assist with this. Thanks!

[stefanlasiewski]

I signed it

[seanmalloy]

/lgtm
/assign @Raffo

[seanmalloy]

/kind documentation

[Raffo]

/approve

[k8s-ci-robot]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: Raffo, stefanlasiewski

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