add_dlist
static void add_dlist(struct dirlist **, struct dirlist *,
add_dlist(&ep->ex_dirl, dp, grp, flags, ep, anoncrp,
add_dlist(&dp->dp_left, newdp, grp, flags, ep, anoncrp,
add_dlist(&dp->dp_right, newdp, grp, flags, ep, anoncrp,