hl_first
for (hl = anchor->hl_first; hl != NULL; hl = nexthl) {
anchor->hl_first = NULL;
for (hl = hilite_anchor.hl_first; hl != NULL; hl = hl->hl_next) {
for (hl = filter_anchor.hl_first; hl != NULL; hl = hl->hl_next) {