* (source, dest, archive, options) 4-tuples as per publish().
* @param $flags Integer: bitfield, may be FileRepo::DELETE_SOURCE to indicate
* that the source files should be deleted if possible
* (source, dest, archive, options) 4-tuples as per publish().
* @param $flags Integer: bitfield, may be FileRepo::DELETE_SOURCE to indicate
* that the source files should be deleted if possible