Problem with proxy_set_header $ssl_client_cert

[Lynoure]

> The $ssl_client_cert variable abuses header continuation, and this
> doesn't work with many http servers (including nginx itself).

Noticed that with spray-can. 

> There should be more portable way to pass client certificate to an
> upstream server.

Is there already, or is there one in plans? Any known workarounds? Encoding
and decoding the $ssl_client_cert somehow? (I'm really new to nginx.)

-- 
Lynoure Braakman

Posted at Nginx Forum: http://forum.nginx.org/read.php?2,236546,236581#msg-236581