main: (order) move root user check after help/version option

With this change, `NetworkManager --help` and `NetworkManager --version`
work for non-root user.

src/main-utils.c

@@ -36,6 +36,7 @@
 
 #include "gsystem-local-alloc.h"
 #include "main-utils.h"
+#include "NetworkManagerUtils.h"
 #include "nm-logging.h"
 
 static gboolean
@@ -172,6 +173,15 @@ nm_main_utils_ensure_not_running_pidfile (const char *pidfile)
 	}
 }
 
+void
+nm_main_utils_ensure_root ()
+{
+	if (getuid () != 0) {
+		fprintf (stderr, _("You must be root to run %s!\n"), str_if_set (g_get_prgname (), ""));
+		exit (1);
+	}
+}
+
 gboolean
 nm_main_utils_early_setup (const char *progname,
                            int *argc,
@@ -205,11 +215,6 @@ nm_main_utils_early_setup (const char *progname,
 	setlocale (LC_ALL, "");
 	textdomain (GETTEXT_PACKAGE);
 
-	if (getuid () != 0) {
-		fprintf (stderr, _("You must be root to run %s!\n"), progname);
-		exit (1);
-	}
-
 	for (i = 0; options[i].long_name; i++) {
 		if (!strcmp (options[i].long_name, "log-level")) {
 			opt_fmt_log_level = options[i].description;

src/main-utils.h

@@ -23,6 +23,8 @@
 
 #include <glib.h>
 
+void     nm_main_utils_ensure_root (void);
+
 void     nm_main_utils_setup_signals (GMainLoop *main_loop);
 
 void     nm_main_utils_ensure_rundir (void);

src/main.c

@@ -283,6 +283,8 @@ main (int argc, char *argv[])
 		exit (0);
 	}
 
+	nm_main_utils_ensure_root ();
+
 	if (!nm_logging_setup (global_opt.opt_log_level,
 	                       global_opt.opt_log_domains,
 	                       &bad_domains,

src/nm-iface-helper.c

@@ -367,6 +367,8 @@ main (int argc, char *argv[])
 		exit (0);
 	}
 
+	nm_main_utils_ensure_root ();
+
 	if (!global_opt.ifname || !global_opt.uuid) {
 		fprintf (stderr, _("An interface name and UUID are required\n"));
 		exit (1);