Fix raw container stats retrieval from kubelet over https

[jimmidyson]

/cc @mwringe @burmanm

[jimmidyson]

@mvdan @vishh Would love a quick review of this if possible - trivial fix with big impact to us :(

[mvdan]

LGTM. Nit though - it's usually preferred to define the default value then override it with special cases, like:

scheme := "http"
if self.config != nil && self.config.EnableHttps {
    scheme = "https"
}

[jimmidyson]

@mvdan Much nicer. Updated.

[jimmidyson]

@mvdan OK to merge?

[mvdan]

Sure :) I thought you would self-merge since I gave my LGTM.

[jimmidyson]

@mvdan I don't know the rules here yet - each community has different rules. But I know for next time - thanks!