www: content: lookup via metadata archive instead of catalog

In case of pxar archives with split metadata and payload data, the
metadata archive has to be used to lookup entries for navigation
before performing a single file restore.

Decide based on the archive filename extension whether to use the
`catalog` or the `pxar-lookup` api endpoint.

Signed-off-by: Christian Ebner <c.ebner@proxmox.com>

www/datastore/Content.js

@@ -786,6 +786,9 @@ Ext.define('PBS.DataStoreContent', {
 		'backup-time': (time.getTime()/1000).toFixed(0),
 		'backup-type': type,
 	    };
+	    if (rec.data.filename.endsWith(".mpxar.didx")) {
+		extraParams['archive-name'] = rec.data.filename;
+	    }
 	    if (view.namespace && view.namespace !== '') {
 		extraParams.ns = view.namespace;
 	    }