Specify initial period in gossip-based cluster name pattern

[neocortical]

This is the most trivial change ever, but I actually got bitten by this and had to grep the source code to figure out that the initial period needed to be in the cluster name suffix.

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Hi @neocortical. Thanks for your PR.

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[neocortical]

The most intense one-character change to a README. :)
/assign @kris-nova

[chrislovecnm]

We should probably mention to use the domain .k8s.local, and provide more examples. For another PR.

/approve no-issue
/ok-to-test

[chrislovecnm]

/lgtm

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[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: chrislovecnm, neocortical

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/test all [submit-queue is verifying that this PR is safe to merge]

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Automatic merge from submit-queue