dnscheck

type Checker struct {
	Server      string
	WantA       string
	Parallel    uint
	Progress    func(done, total uint)
	MaxFailed   int
	LogFailures bool

	Okay        uint
	WrongResult map[string]struct{}
	NoResult    map[string]struct{}
	WrongOpcode map[string]map[string]struct{}
	Failed      map[string]struct{}
}