The cache parameter now follows these rules: if it is a positive integer greater or equal than 1, it will be considered max-age (seconds) and will cause both last-modified (with actual resource date) and cache-control (with value max-age={cache}) headers to be sent; anything else will cause the server to send aggressive no-cache headers (expires with very old date, "Thu, 19 Apr 1982 00:00:00 GMT", and cache-control with cache-bursting value "max-age=0, private, no-store, no-cache, must-revalidate, proxy-revalidate").