*
* Set a custom cache-control header, usually being "private" or "public";
* The max_age parameter controls how long the cache entry is valid on the client side.
*
* Expects a string parameter containing the primary cache control setting.
* Additionally accepts an int parameter specifying the max-age setting.
*
* Set a custom cache-control header, usually being "private" or "public";
* The max_age parameter controls how long the cache entry is valid on the client side.
*
* Expects a string parameter containing the primary cache control setting.
* Additionally accepts an int parameter specifying the max-age setting.