+ /* netname "." is special: a "top-level name" */
+ netname = strcmp(optarg, ".") != 0 ?
+ xstrdup(optarg) : NULL;
+ break;
+
+ case 'o': /* option */
+ cfg = parse_config_line(optarg, NULL, ++lineno);
+ if (!cfg)
+ return false;
+ list_insert_tail(cmdline_conf, cfg);