initial commit from their example

Signed-off-by: Vincent Batts <vbatts@hashbangbash.com>

go.mod

@@ -0,0 +1,5 @@
+module git.thisco.de/vbatts/home0
+
+go 1.16
+
+require github.com/Focinfi/go-dns-resolver v1.0.0

main.go

@@ -0,0 +1,39 @@
+package main
+
+import (
+	"log"
+
+	dns "github.com/Focinfi/go-dns-resolver"
+)
+
+func main() {
+	domains := []string{"google.com", "twitter.com"}
+	types := []dns.QueryType{dns.TypeA, dns.TypeNS, dns.TypeMX, dns.TypeTXT}
+
+	// Set timeout and retry times
+	dns.Config.SetTimeout(uint(2))
+	dns.Config.RetryTimes = uint(4)
+
+	// Simple usage
+	if results, err := dns.Exchange("google.com", "119.29.29.29", dns.TypeA); err == nil {
+		for _, r := range results {
+			log.Println(r.Record, r.Type, r.Ttl, r.Priority, r.Content)
+		}
+	} else {
+		log.Fatal(err)
+	}
+
+	// Create and setup resolver with domains and types
+	resolver := dns.NewResolver("119.29.29.29")
+	resolver.Targets(domains...).Types(types...)
+	// Lookup
+	res := resolver.Lookup()
+
+	//res.ResMap is a map[string]*ResultItem, key is the domain
+	for target := range res.ResMap {
+		log.Printf("%v: \n", target)
+		for _, r := range res.ResMap[target] {
+			log.Println(r.Record, r.Type, r.Ttl, r.Priority, r.Content)
+		}
+	}
+}