PP_NEEDAUTH
sp->pp_flags &= ~PP_NEEDAUTH;
sp->pp_flags |= PP_NEEDAUTH;
(sp->pp_flags & PP_NEEDAUTH) != 0)
sp->pp_flags &= ~PP_NEEDAUTH;
if (sp->pp_flags & PP_NEEDAUTH) {
sp->pp_flags &= ~PP_NEEDAUTH;
if (sp->pp_flags & PP_NEEDAUTH) {