flag.StringVar(&cfg.docroot, "r", cfg.docroot, "document root `directory`")
flag.StringVar(&cfg.idxpage, "I", cfg.idxpage, "directory index `file` name")
flag.StringVar(&cfg.header, "H", cfg.header, "header: prepend contents of `file` to generated pages")
flag.StringVar(&cfg.docroot, "r", cfg.docroot, "document root `directory`")
flag.StringVar(&cfg.idxpage, "I", cfg.idxpage, "directory index `file` name")
flag.StringVar(&cfg.header, "H", cfg.header, "header: prepend contents of `file` to generated pages")