DATE_GMT:
DATE_LOCAL:
DOCUMENT_NAME:
DOCUMENT_ROOT:
DOCUMENT_URI:
GATEWAY_INTERFACE:
HTTP_ACCEPT:
HTTP_ACCEPT_CHARSET:
HTTP_ACCEPT_ENCODING
HTTP_ACCEPT_LANGUAGE
HTTP_CONNECTION:
HTTP_HOST:
HTTP_REFERER:
HTTP_USER_AGENT:
LAST_MODIFIED:
PATH:
REMOTE_ADDR:
REMOTE_PORT:
REQUEST_METHOD:
REQUEST_URI:
SCRIPT_NAME:
SERVER_NAME:
SERVER_PORT:
SERVER_PROTOCOL:
Based on http://www.pi.dk/support/ssi.htm.