cmd/discosrv: Fix lint warnings

GitHub-Pull-Request: https://github.com/syncthing/syncthing/pull/3275

cmd/discosrv/main.go

@@ -52,7 +52,7 @@ var (
 	certFile    = "cert.pem"
 	keyFile     = "key.pem"
 	debug       = false
-	useHttp     = false
+	useHTTP     = false
 )
 
 func main() {
@@ -76,14 +76,14 @@ func main() {
 	flag.StringVar(&certFile, "cert", certFile, "Certificate file")
 	flag.StringVar(&keyFile, "key", keyFile, "Key file")
 	flag.BoolVar(&debug, "debug", debug, "Debug")
-	flag.BoolVar(&useHttp, "http", useHttp, "Listen on HTTP (behind an HTTPS proxy)")
+	flag.BoolVar(&useHTTP, "http", useHTTP, "Listen on HTTP (behind an HTTPS proxy)")
 	flag.Parse()
 
 	log.Println(LongVersion)
 
 	var cert tls.Certificate
 	var err error
-	if !useHttp {
+	if !useHTTP {
 		cert, err = tls.LoadX509KeyPair(certFile, keyFile)
 		if err != nil {
 			log.Fatalln("Failed to load X509 key pair:", err)

cmd/discosrv/querysrv.go

@@ -83,7 +83,7 @@ func (s *querysrv) Serve() {
 		Cache: lru.New(lruSize),
 	}
 
-	if useHttp {
+	if useHTTP {
 		listener, err := net.Listen("tcp", s.addr)
 		if err != nil {
 			log.Println("Listen:", err)
@@ -153,7 +153,7 @@ func (s *querysrv) handler(w http.ResponseWriter, req *http.Request) {
 	}()
 
 	var remoteIP net.IP
-	if useHttp {
+	if useHTTP {
 		remoteIP = net.ParseIP(req.Header.Get("X-Forwarded-For"))
 	} else {
 		addr, err := net.ResolveTCPAddr("tcp", req.RemoteAddr)