allow multiple hostnames in certificate

[ibotty]

That would not only help in not getting rate limited, but also when deploying non-http services that listen on different hosts. They could share a certificate that way.

[pramodhkp]

@tnozicka I could pick this up and work on it. Would you be willing to accept a PR for this?

EDIT: I see that this needs DNS challenge (#41) to be supported first.

[openshift-bot]

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/lifecycle stale

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/lifecycle rotten
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[openshift-ci-robot]

@openshift-bot: Closing this issue.

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