KRB5_UTF8_CHARLEN2
if (KRB5_UTF8_CHARLEN2(bytes, tmplen) != len)
len = KRB5_UTF8_CHARLEN2(t->p, len);
len = KRB5_UTF8_CHARLEN2(p, len);
chlen = KRB5_UTF8_CHARLEN2(utf8, chlen);