Tinyproxy version

1.11.0 stable

Issue

To send multiple cookies, multiple Set-Cookie headers should be sent in the same response.

-- https://developer.mozilla.org/en-US/docs/Web/HTTP/Headers/Set-Cookie

All but the first of Set-Cookie headers in an HTTP response will be silently dropped by tinyproxy, making websites setting multiple cookies at once fail erratically.

add_header_to_connection() in reqs.c calls orderedmap_append() to buffer the response headers, but if a header with the same key already exists, it will be silently dropped.