options_from_file
if (!options_from_file(_PATH_SYSOPTIONS, !privileged, 0, 1)
return options_from_file(*argv, 1, 1, privileged_option);
ok = options_from_file(fname, 1, 1, 1);
ret = options_from_file(path, 0, 1, privileged);
ret = options_from_file(path, 0, 0, 1);
int options_from_file(char *filename, int must_exist, int check_prot,