Nginx 1.x and Vary header HTTP

I’m reading this web page:

that leads to this statement (Module ngx_http_proxy_module):
“nginx does not handle “Vary” headers when caching.”

I found this bug tracker page:

that seems related to the same topic.

Are there news about supporting / honoring the Vary header using nginx
purely as a reverse proxy in front of IIS / Tomcat / Apache webservers?

I’m using nginx 1.2.6 on a freebsd 9.1 amd64 box.

Thanks in advance,