M_COPYFLAGS
n = m_getcl(how, m->m_type, m->m_flags & M_COPYFLAGS);
n = m_getcl(how, m->m_type, m->m_flags & M_COPYFLAGS);
to->m_flags = (from->m_flags & M_COPYFLAGS) | (to->m_flags & M_EXT);
to->m_flags = (from->m_flags & M_COPYFLAGS) | (to->m_flags & M_EXT);