Title: Occasional errors in downloads from sourceforge

Very occasionally I get messages like these: (sequence-master [master-name blank-draft] [warning] Could not retrieve image from 'http://docbook.sourceforge.net/release/images/draft.png': java.net.ConnectException: Operation timed out) (sequence-master [master-name front-odd-draft] [warning] Could not retrieve image from 'http://docbook.sourceforge.net/release/images/draft.png': java.net.ConnectException: Connection refused) (sequence-master [master-name back-first-draft] [warning] Cannot reconnect to "http://docbook.sourceforge.net/release/images/draft.png": java.net.ConnectException: Operation timed out. A previously cached copy will be used.) These always cause long delays in FO transformations, but eventually they complete OK. Clearly this is when sourceforge is down for whatever reason, but I would like to avoid having to download anything during an FO transformation. How can I keep a local copy of whatever is needed and instruct use of local copies (in a catalog perhaps.) (I have local copies of DTD and XSL files of course.) MacOS 10.3.9, Docbook 4.5, Saxon 6.5.5, XSL style sheets 1.70.1, XEP 4.9, using Oxygen 8.1 Ron