IXR_Server::setCapabilities

                'specVersion' => 1
        ),
            'faults_interop' => array(
                'specUrl' => 'http://xmlrpc-epi.sourceforge.net/specs/rfc.fault_codes.php',
                'specVersion' => 20010516
        ),
            'system.multicall' => array(
                'specUrl' => 'http://www.xmlrpc.com/discuss/msgReader$1208',
                'specVersion' => 1
        ),
        );
    }

    function getCapabilities($args)
    {
        return $this->capabilities;
    }