void usage(void)
{
fprintf(stderr,
- "Usage:\t shutdown [-akrhHPfnc] [-t secs] time [warning message]\n"
+ "Usage:\t shutdown [-akrhPHfFnc] [-t sec] time [warning message]\n"
"\t\t -a: use /etc/shutdown.allow\n"
"\t\t -k: don't really shutdown, only warn.\n"
"\t\t -r: reboot after shutdown.\n"