CVE-2026-15709: bound permessage-deflate inflation to the connection's
remaining max-incoming-payload-size allowance in
soup_websocket_extension_deflate_process_incoming_message_with_limit(),
so a compression bomb can no longer allocate without limit before the
post-inflation size check runs
CVE-2026-15711: reject a WebSocket control frame that declares an extended
payload length in process_frame(), which RFC 6455 section 5.5 forbids