bruteforce

type Options struct {
	Domain             string
	WordlistPath       string
	Permutations       bool
	PermutationThreads int
	DNSServer          string
	Timeout            time.Duration
	Workers            int
	AutoTune           bool
	ProgressWriter     io.Writer
	RateLimiter        *ratelimit.Limiter
}

type Result struct {
	Subdomain string
	Rcode     int
	Answers   []string
}