The release notes of version 3.5 only say “http_header(cookie): Blablabla” about the syntax of the cookie header.
How to set multiple cookies? Some of the tries I made:
http_header(cookie): a=test_a; b=test_b
http_header(cookie): a=test_a; b=test_b;
http_header(cookie): “a=test_a; b=test_b;”
http_header(cookie): a=test_a;b=test_b;
http_header(cookie): a=“test_a”; b=“test_b”;
http_header(cookie): a=test_a, b=test_b,
They apparently did not work, but I could be wrong and the issue be something else.