MDL-76929 Libraries: Upgrade phpxmlrpc to 4.10.1

lib/phpxmlrpc/Exception/HttpException.php

@@ -2,7 +2,10 @@
 
 namespace PhpXmlRpc\Exception;
 
-class HttpException extends PhpXmlrpcException
+/**
+ * To be used for all errors related to parsing HTTP requests and responses
+ */
+class HttpException extends TransportException
 {
     protected $statusCode;