Parse uPNP XML errors

[Vagabond]

There's a lot of helpful information in the XML errors we get back from upnp servers:

<s:Envelope xmlns:s=\"http://schemas.xmlsoap.org/soap/envelope/\" s:encodingStyle=\"http://schemas.xmlsoap.org/soap/encoding/\"><s:Body><s:Fault><faultcode>s:Client</faultcode><faultstring>UPnPError</faultstring><detail><UPnPError xmlns=\"urn:schemas-upnp-org:control-1-0\"><errorCode>714</errorCode><errorDescription>NoSuchEntryInArray</errorDescription></UPnPError></detail></s:Fault></s:Body></s:Envelope>

<s:Envelope xmlns:s=\"http://schemas.xmlsoap.org/soap/envelope/\" s:encodingStyle=\"http://schemas.xmlsoap.org/soap/encoding/\"><s:Body><s:Fault><faultcode>s:Client</faultcode><faultstring>UPnPError</faultstring><detail><UPnPError xmlns=\"urn:schemas-upnp-org:control-1-0\"><errorCode>718</errorCode><errorDescription>ConflictInMappingEntry</errorDescription></UPnPError></detail></s:Fault></s:Body></s:Envelope>

It would be nice to have some richer errors returned to the user so the client can make better decisions about what it should do.

[benoitc]

that's a good idea , should be easy to make it generic.