Move golang code to third_party

pkg/util/net.go

@@ -19,7 +19,6 @@ package util
 import (
 	"fmt"
 	"net"
-	"net/url"
 	"strings"
 )
 
@@ -62,24 +61,3 @@ func (ipnet *IPNet) Set(value string) error {
 func (*IPNet) Type() string {
 	return "ipNet"
 }
-
-// FROM: http://golang.org/src/net/http/client.go
-// Given a string of the form "host", "host:port", or "[ipv6::address]:port",
-// return true if the string includes a port.
-func hasPort(s string) bool { return strings.LastIndex(s, ":") > strings.LastIndex(s, "]") }
-
-// FROM: http://golang.org/src/net/http/transport.go
-var portMap = map[string]string{
-	"http":  "80",
-	"https": "443",
-}
-
-// FROM: http://golang.org/src/net/http/transport.go
-// canonicalAddr returns url.Host but always with a ":port" suffix
-func CanonicalAddr(url *url.URL) string {
-	addr := url.Host
-	if !hasPort(addr) {
-		return addr + ":" + portMap[url.Scheme]
-	}
-	return addr
-}