* Returns FALSE on failure, or *exits* with "304 Not Modified" if the entity is cached.
*
* A log entry will be written to the cache log if the INI entry
* Returns FALSE on failure, or *exits* with "304 Not Modified" if the entity is cached.
*
* A log entry will be written to the cache log if the INI entry
* Returns FALSE on failure, or *exits* with "304 Not Modified" if the entity is cached.
*
* A log entry is written to the cache log if the INI entry
* Returns FALSE on failure, or *exits* with "304 Not Modified" if the entity is cached.
*
* A log entry is written to the cache log if the INI entry
* Returns FALSE on failure, or *exits* on success.
*
* A log entry will be written to the redirect log, if the INI entry
* Returns FALSE on failure, or *exits* on success.
*
* A log entry will be written to the redirect log, if the INI entry