add IPv6 default route interface auto-detection for permanent/temporary IPv6 without netif

- get_default_route_netif_index(): UDP connect trick + getifaddrs to find default route iface
- etcp_socket_add(): auto-detect netif_index when not specified in config
- queue_new() API: explicit index_offset/index_size params instead of implicit from hash_size
- radix: cleanup types (uint8_t*), replace bzero/bcmp with memset/memcmp, remove kernel ifdefs
- route6_lib: new IPv6 routing library + get_node_v6_routes()

tests/test_intensive_memory_pool.c

@@ -27,7 +27,7 @@ static double test_without_pools(int iterations) {
     clock_t start = clock();
     
     struct UASYNC* ua = uasync_create();
-    struct ll_queue* queue = queue_new(ua, 0,"q1");  // Без пулов
+    struct ll_queue* queue = queue_new(ua, 0, 0, 0,"q1");  // Без пулов
     
     for (int cycle = 0; cycle < iterations; cycle++) {
         // Создать много waiters
@@ -70,7 +70,7 @@ static double test_with_pools(int iterations) {
     clock_t start = clock();
     
     struct UASYNC* ua = uasync_create();
-    struct ll_queue* queue = queue_new(ua, 0,"q2");  // С пулами
+    struct ll_queue* queue = queue_new(ua, 0, 0, 0,"q2");  // С пулами
     
     // Создать пул памяти для данных
     struct memory_pool* pool = memory_pool_init(sizeof(struct ll_entry) + 64);