upnp and cover art

[simoncn]

The UPnP specification provides a metadata property upnp:albumArtURI for sending an image URL from the server to the control point. Multiple values for this property are allowed by the UPnP specification but there is no way to identify them as front cover, back cover, etc.

MinimServer only sends a single image URL in the upnp:albumArtURI property. If a UPnP server sends multiple values for this property, it is more likely that they would be the same image at different resolutions.