NOTE: Following instruction are for apache >= 2.0

If you need to append anything in the apache response header you have to enable the mod_header in the server config this way:

LoadModule headers_module modules/mod_headers.so

The instruction are quite simple, in the VirtualHost section you want to modify the header you have to add the following instruction:

RequestHeader append peppe_SSL "https"

Where peppe_SSL is the name of the token containing https