serviced_cmp
!(outnet->serviced = rbtree_create(serviced_cmp)) ||
int serviced_cmp(const void* key1, const void* key2);
else if(fptr == &serviced_cmp) return 1;
!(outnet->serviced = rbtree_create(serviced_cmp)) ||
int serviced_cmp(const void* key1, const void* key2);
else if(fptr == &serviced_cmp) return 1;