Revert "Parse XML using XML parser instead of using regex in get.php"

This reverts commit 5828423453.

shared/main.php

@@ -16,7 +16,7 @@ limitations under the License.
 */
 
 function uupApiVersion() {
-    return '1.15.10';
+    return '1.15.11';
 }
 
 require_once dirname(__FILE__).'/auths.php';