server: Allow opening the Afd device with a file name.

dlls/ws2_32/tests/afd.c

@@ -64,7 +64,7 @@ static void test_open_device(void)
     RtlInitUnicodeString(&string, L"\\Device\\Afd\\foobar");
     InitializeObjectAttributes(&attr, &string, 0, NULL, NULL);
     ret = NtOpenFile(&handle, SYNCHRONIZE, &attr, &io, 0, 0);
-    todo_wine ok(!ret, "got %#x\n", ret);
+    ok(!ret, "got %#x\n", ret);
     CloseHandle(handle);
 
     s = socket(AF_INET, SOCK_STREAM, IPPROTO_TCP);

server/sock.c

@@ -1981,6 +1981,7 @@ static void socket_device_dump( struct object *obj, int verbose )
 static struct object *socket_device_lookup_name( struct object *obj, struct unicode_str *name,
                                                  unsigned int attr, struct object *root )
 {
+    if (name) name->len = 0;
     return NULL;
 }