- sort options; from josiah frentsos

ok nicm

- add -N to SYNOPSIS

- sort usage()

tmux.c

@@ -57,7 +57,7 @@ static __dead void
 usage(void)
 {
 	fprintf(stderr,
-	    "usage: %s [-2CDlNuvV] [-c shell-command] [-f file] [-L socket-name]\n"
+	    "usage: %s [-2CDlNuVv] [-c shell-command] [-f file] [-L socket-name]\n"
 	    "            [-S socket-path] [-T features] [command [flags]]\n",
 	    getprogname());
 	exit(1);