beremiz

50600b946ea7
OPC-US client: add support for x509 and user+password authentication.

Commit for backup not including tests since encrypted OPC-UA test are still not valid.
<?xml version='1.0' encoding='utf-8'?>
<OPCUAClient xmlns:xsd="http://www.w3.org/2001/XMLSchema">
<AuthType>
<x509>
<Policy/>
<Mode/>
</x509>
</AuthType>
</OPCUAClient>