add is-encrypted on Parser

iOSClient/Library/OCCommunicationLib/OCWebDavClient/Parsers/OCXMLParser.m

@@ -239,6 +239,8 @@ NSString *OCCWebDAVURIKey           = @"uri";
         _currentFile.isFavorite = [_xmlChars boolValue];
     } else if ([elementName isEqualToString:@"x1:share-permissions"]) {
         _currentFile.permissions = _xmlChars;
+    } else if ([elementName isEqualToString:@"nc:is-encrypted"]) {
+        _currentFile.isEncrypted = [_xmlChars boolValue];
     }
 }