RTF_MODIFIED
{ RTF_MODIFIED, 'M' },
rt->rt_flags |= RTF_MODIFIED;
flags |= RTF_MODIFIED;
!ISSET(rt->rt_flags, RTF_DYNAMIC|RTF_MODIFIED) &&
!ISSET(rt->rt_flags, RTF_DYNAMIC|RTF_MODIFIED) &&
{ RTF_MODIFIED, 'M' },
RTFLAG("M", RTF_MODIFIED);