(xmlrpc) interpret mvc/array type objects in xmlrpc server sync procedure

src/etc/inc/xmlrpc/legacy.inc

@@ -84,8 +84,10 @@ function merge_config_attributes(&$cnf_source, &$cnf_dest)
 {
    foreach ($cnf_source as $cnf_key => &$cnf_value) {
        if (is_array($cnf_value)) {
-           if (!isset($cnf_dest[$cnf_key]) || !is_array($cnf_dest[$cnf_key]) ||
-                (count($cnf_dest[$cnf_key]) > 0 && isset($cnf_dest[$cnf_key][0]))) {
+           if (!isset($cnf_dest[$cnf_key]) || !is_array($cnf_dest[$cnf_key]) || // new
+                (count($cnf_dest[$cnf_key]) > 0 && isset($cnf_dest[$cnf_key][0])) || // sequenced item
+                (count($cnf_dest[$cnf_key]) > 0 && isset($cnf_dest[$cnf_key]['@attributes']['uuid'])) // mvc array
+                ) {
                // (re)set destination array when new or containing a sequenced list of items
                $cnf_dest[$cnf_key] = array();
            }