- CM_V6_ANY for :: socket (matches all v6 addr classes)
- sin6_scope_id from s->netif_index (not from local_addr where :: has scope=0)
- getnameinfo in stcp_link_connect to preserve scope_id in addr string
- scope_id in cm_invite_tcp_connect, ncd_create_links, connect_create_links_v6, cm_bg_ping_to_node
- ncd_down_cb: defer callback removal+close via uasync_call_soon to avoid
UAF in etcp_cbk_fire iteration (removing ncd_up_cb corrupts saved next ptr)
- ncd_recv_control_handler: use deferred close for CLOSE handlers instead of
direct etcp_connection_close to avoid nested etcp_cbk_fire UAF
- node_conn_direct_open/open_node: use ni->node_name if available for
conn name, fallback to 'n_<node_id>' instead of NULL
- init_connections: build ni_tmp in link loop with only current link's addr,
preventing NCD from creating links for ALL addrs on first socket
- utun_instance_reload: same per-link ni_tmp fix
- init_connections/reload: set ni_tmp.node_name = client->name for
test find_client_link by name
evgeny