Keep connection construction independent from link admission policy

tests/test_dummynet_channels.c

@@ -257,7 +257,7 @@ static void inline_filter(void) {
     struct UTUN_INSTANCE* inst = utun_instance_create_from_str(ua,
         "[global]\nauto_sockets=no\n[ntp]\nenabled=no\n[server:udp]\naddr=127.0.0.1:0\ntype=public\n");
     CHECK(inst && inst->etcp_sockets);
-    struct ETCP_CONN* connection = etcp_connection_create(inst, "inline filter test", 0); CHECK(connection);
+    struct ETCP_CONN* connection = etcp_connection_create(inst, "inline filter test"); CHECK(connection);
     struct sockaddr_storage target = {0};
     struct sockaddr_in* address = (struct sockaddr_in*)⌖
     *address = proxy; address->sin_port = htons(socket_get_bound_port(peers[1]));

tests/test_etcp_driver.c

@@ -98,7 +98,7 @@ static void setup(int require_known_node) {
         ep->inst.data_pool = memory_pool_init(PACKET_DATA_SIZE, "driver_payload");
         ep->inst.ack_pool = memory_pool_init(sizeof(struct ACK_PACKET), "driver_acks");
         assert(ep->inst.connections && ep->inst.pkt_pool && ep->inst.data_pool && ep->inst.ack_pool);
-        ep->conn = etcp_connection_create(&ep->inst, "dynamic-driver", i == 1 && require_known_node); assert(ep->conn && !ep->conn->links);
+        ep->conn = etcp_connection_create(&ep->inst, "dynamic-driver"); assert(ep->conn && !ep->conn->links);
         assert(!etcp_bind(&ep->inst, 253, receive));
     }
     for (int i = 0; i < 2; i++) {

tests/test_ncd_faults.c

@@ -68,7 +68,7 @@ static void teardown(void) {
 }
 
 static struct ETCP_CONN* connection(int ready) {
-    struct ETCP_CONN* conn = etcp_connection_create(inst, "NCD fault fixture", 0); CHECK(conn);
+    struct ETCP_CONN* conn = etcp_connection_create(inst, "NCD fault fixture"); CHECK(conn);
     conn->peer_node_id = 42;
     queue_set_callback(conn->send_input_q, NULL, NULL);
     CHECK(etcp_conn_index_peer(conn) == 0);