$https with SSL proxy

[Antonio P.P. Almeida]

> The problem is that all applications rely on this "https" header,
> changing the code of all applications makes no sense to me.

AFAIK it's not a header but rather a parameter that is passed through CGI
and in PHP, for example, you recover via $_SERVER['HTTPS']. This has
nothing to do with headers. Of course you can set a header based on it.

X-Forwarded-Proto $https;

or

X-Forwarded-Proto $my_https;

---appa