UTF-8 encoding.

[RolandoCartagena]

When I am creating the server and add $server->soap_defencoding = 'UTF-8';

The XML is always generated with encoding="ISO-8859-1".

Inside the nusoap class the change was made:
//var $soap_defencoding = 'ISO-8859-1';
var $soap_defencoding = 'UTF-8';

The XML is always generated with encoding="ISO-8859-1".

In line 5643 it was found $xml = '<?xml version="1.0" encoding="ISO-8859-1"?>';

was replaced by $xml = '<?xml version="1.0" encoding="' . $this->soap_defencoding . '"?>';

The XML is already generated correctly

<?xml version="1.0" encoding="UTF-8"?>

[haeussler-pharma4u]

I created a pull request that fixes this issue, without changing the default soap_defencoding: #114