Description:
------------
When playing around with the mod_spdy Apache module it seems that the HTTPS key in 
the _SERVER variable is set to off. I'm not sure if this is the job for PHP or 
SPDY but I thought I'd start here. 

Test script:
---------------
<?php 

/* 1. Install mod_spdy using the instructions from http://code.google.com/p/mod-spdy/wiki/GettingStarted

Connect to the server and dump _SERVER */ 

var_dump($_SERVER); 

Expected result:
----------------
  ["HTTPS"]=>
  string(3) "On"

Actual result:
--------------
array(40) {
  ["REDIRECT_SPDY_VERSION"]=>
  string(1) "2"
  ["SPDY_VERSION"]=>
  string(1) "2"

..

  ["SERVER_PORT"]=>
  string(3) "443"

..

  ["HTTPS"]=>
  string(3) "Off"
}