fix path to webdav in oc4

src/eu/alefzero/owncloud/AccountUtils.java

@@ -30,7 +30,7 @@ import android.preference.PreferenceManager;
 public class AccountUtils {
     public static final String WEBDAV_PATH_1_2 = "/webdav/owncloud.php";
     public static final String WEBDAV_PATH_2_0 = "/files/webdav.php";
-    public static final String WEBDAV_PATH_4_0 = "/remote/webdav.php";
+    public static final String WEBDAV_PATH_4_0 = "/remote.php/webdav";
     public static final String CARDDAV_PATH_2_0 = "/apps/contacts/carddav.php";
     public static final String CARDDAV_PATH_4_0 = "/remote/carddav.php";
     public static final String STATUS_PATH = "/status.php";