Added code to process min and max file size directives and to
init the expirychk flag in mod_disk_cache. Added a clarifying
comment to cache_util.   [Paul J. Reder]


git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/trunk@97450 13f79535-47bb-0310-9956-ffa450edef68