PMM-7 Better grafana start/stop handler (#3325) · percona/pmm@dc1bbe8

Error return value of `fmt.Fprintf` is not checked (errcheck)

Error return value of `fmt.Fprintf` is not checked (errcheck)

Error return value of `fmt.Fprintf` is not checked (errcheck)

Error return value of `fmt.Fprintln` is not checked (errcheck)

Error return value of `fmt.Fprintln` is not checked (errcheck)

Error return value of `fmt.Fprintln` is not checked (errcheck)

Error return value of `fmt.Fprint` is not checked (errcheck)

Error return value of `fmt.Fprint` is not checked (errcheck)

singleCaseSwitch: should rewrite switch statement to if statement (gocritic)

ifElseChain: rewrite if-else to switch statement (gocritic)

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