lib/http: disable automatic authentication skipping for unix sockets

Disabling the authentication for unix sockets makes it impossible to
use `rclone serve` behind a proxy that that communicates with rclone
via a unix socket.

Re-enabling the authentication should not have any effect on most
users of unix sockets as they do not set authentication up with a unix
socket anyway.

lib/http/middleware.go

@@ -57,11 +57,6 @@ func NewLoggedBasicAuthenticator(realm string, secrets goauth.SecretProvider) *L
 func basicAuth(authenticator *LoggedBasicAuth) func(next http.Handler) http.Handler {
 	return func(next http.Handler) http.Handler {
 		return http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
-			// skip auth for unix socket
-			if IsUnixSocket(r) {
-				next.ServeHTTP(w, r)
-				return
-			}
 			// skip auth for CORS preflight
 			if r.Method == "OPTIONS" {
 				next.ServeHTTP(w, r)
@@ -123,11 +118,6 @@ func MiddlewareAuthBasic(user, pass, realm, salt string) Middleware {
 func MiddlewareAuthCustom(fn CustomAuthFn, realm string, userFromContext bool) Middleware {
 	return func(next http.Handler) http.Handler {
 		return http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
-			// skip auth for unix socket
-			if IsUnixSocket(r) {
-				next.ServeHTTP(w, r)
-				return
-			}
 			// skip auth for CORS preflight
 			if r.Method == "OPTIONS" {
 				next.ServeHTTP(w, r)
@@ -175,11 +165,6 @@ func MiddlewareCORS(allowOrigin string) Middleware {
 
 	return func(next http.Handler) http.Handler {
 		return http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
-			// skip cors for unix sockets
-			if IsUnixSocket(r) {
-				next.ServeHTTP(w, r)
-				return
-			}
 
 			if allowOrigin != "" {
 				w.Header().Add("Access-Control-Allow-Origin", allowOrigin)