EXFLAG_NSCERT
(((x)->ex_flags & EXFLAG_NSCERT) != 0 && ((x)->ex_nscert & (usage)) == 0)
x->ex_flags |= EXFLAG_NSCERT;
else if ((x->ex_flags & EXFLAG_NSCERT) != 0
if ((x->ex_flags & EXFLAG_NSCERT) != 0) {