HashiCorp license change to BSL

[ckotzbauer]

This issue tracks how the Kured project might be impacted by a HashiCorp license change. For more context, see this issue for CNCF projects cncf/foundation#617.

We use the following lib indirectly

github.com/hashicorp/hcl v1.0.0 // indirect

[dholbach]

On my phone right now, but AFAICT we pull this in through our use of spf13/viper. It might very well be listed in the license exceptions in https://github.com/cncf/foundation

[github-actions]

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