* switch to composer for qrcode and otp dependencies

* move most OTP-related stuff into userhelper
* remove old phpqrcode and otphp libraries

vendor/thecodingmachine/safe/generated/xmlrpc.php

@@ -0,0 +1,22 @@
+<?php
+
+namespace Safe;
+
+use Safe\Exceptions\XmlrpcException;
+
+/**
+ * Sets xmlrpc type, base64 or datetime, for a PHP string value.
+ *
+ * @param string|\DateTime $value Value to set the type
+ * @param string $type 'base64' or 'datetime'
+ * @throws XmlrpcException
+ *
+ */
+function xmlrpc_set_type(&$value, string $type): void
+{
+    error_clear_last();
+    $result = \xmlrpc_set_type($value, $type);
+    if ($result === false) {
+        throw XmlrpcException::createFromPhpError();
+    }
+}