item_cmp_ci
RB_GENERATE_STATIC(itemsgci, item, entrygci, item_cmp_ci);
RB_GENERATE_STATIC(itemsci, item, entryci, item_cmp_ci);
int item_cmp_ci(struct item *, struct item *);
RB_PROTOTYPE_STATIC(itemsgci, item, entrygci, item_cmp_ci);
RB_PROTOTYPE_STATIC(itemsci, item, entryci, item_cmp_ci);