MBS_ALL_FLAGS
subject->mbs_neg = MBS_ALL_FLAGS ^ neg;
if (rule->mbr_subject.mbs_neg == MBS_ALL_FLAGS) {
if ((rule->mbr_subject.mbs_flags | MBS_ALL_FLAGS) != MBS_ALL_FLAGS)
if ((rule->mbr_subject.mbs_neg | MBS_ALL_FLAGS) != MBS_ALL_FLAGS)