lightningd: handle --version before trying to move to lightning-dir.

Otherwise it creates the lightning-dir.  This can't be helped for --help
(at least, if plugins are present), but --version simply prints and exits.

Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>

lightningd/options.c

@@ -747,6 +747,9 @@ static void handle_minimal_config_opts(struct lightningd *ld,
 			       &ld->config_dir,
 			       "Set working directory. All other files are relative to this");
 
+	/* Handle --version (and exit) here too: don't create lightning-dir for this */
+	opt_register_version();
+
 	opt_early_parse_incomplete(argc, argv, opt_log_stderr_exit);
 
 	/* Now, reset and ignore those options from now on. */