Made an example in godoc for it

ex/Makefile

@@ -1,6 +1,5 @@
 .PHONY: ex
-EXAMPLES=mx \
-	 chaos \
+EXAMPLES=chaos \
 	 key2ds \
 	 axfr \
 	 reflect \

ex/mx/mx.go

@@ -1,38 +0,0 @@
-package main
-
-// Print the MX records of a domain
-// (c) Miek Gieben - 2011
-import (
-	"fmt"
-	"github.com/miekg/dns"
-	"os"
-)
-
-func main() {
-	if len(os.Args) != 2 {
-		fmt.Printf("%s DOMAIN\n", os.Args[0])
-		os.Exit(1)
-	}
-
-	// Error checking
-	config, _ := dns.ClientConfigFromFile("/etc/resolv.conf")
-	c := new(dns.Client)
-	m := new(dns.Msg)
-	m.SetQuestion(dns.Fqdn(os.Args[1]), dns.TypeMX)
-	m.MsgHdr.RecursionDesired = true
-
-	// Simple sync query, nothing fancy
-	r, err := c.Exchange(m, config.Servers[0]+":"+config.Port)
-	if err != nil {
-		fmt.Printf("%s\n", err.Error())
-		os.Exit(1)
-	}
-	if r.Rcode != dns.RcodeSuccess {
-		fmt.Printf(" *** invalid answer name %s after MX query for %s\n", os.Args[1], os.Args[1])
-		os.Exit(1)
-	}
-	// Stuff must be in the answer section
-	for _, a := range r.Answer {
-		fmt.Printf("%v\n", a)
-	}
-}