Move into nested docroot

web/core/modules/user/src/UserServiceProvider.php

@@ -0,0 +1,8 @@
+<?php
+// @codingStandardsIgnoreFile
+// This class is intentionally empty so that it overwrites when sites are
+// updated from a zip/tarball without deleting the /core folder first.
+// @todo: remove in 8.3.x
+//
+namespace Drupal\user;
+class UserServiceProvider {}