Multiple Set-Cookie headers with auth_request

[brianv0]

Hi,

I've run into an issue where a cookie I'm sending back to a browser is too
large (> 4kB), so it's being split into two cookies. This results in two
`Set-Cookie` headers. 

Unfortunately, it seems that `auth_request_set` doesn't work well with this,
because you only get the first header.

Is there a way around this? I saw the var `$upstream_cookie_[name]`, which
might work (though awkwardly - you'd need to set use that once for every
possible header part), and the other idea I had was maybe using an
`access_by_lua` script to try to fix this in some way, but I'm not sure how
I'd go about that either.

Posted at Nginx Forum: https://forum.nginx.org/read.php?2,282868,282868#msg-282868