XREF_DELETE_MARKER
c->highest_xseqno = (ref->xseqno & ~XREF_DELETE_MARKER);
ref->xseqno |= XREF_DELETE_MARKER;
ref->xseqno &= ~XREF_DELETE_MARKER;
c->highest_xseqno = (ref->xseqno & ~XREF_DELETE_MARKER);
xseqno |= XREF_DELETE_MARKER;
ref->xseqno |= XREF_DELETE_MARKER;
ref->xseqno |= XREF_DELETE_MARKER;
return ((ref->xseqno & XREF_DELETE_MARKER) != 0);