Scrap CacheMaxExpireMin and CacheDefaultExpireMin. Change

CacheMaxExpire and CacheDefaultExpire to use seconds rather than
hours.
PR:
Obtained from:
Submitted by:
Reviewed by:	Bill Stoddard


git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/trunk@93810 13f79535-47bb-0310-9956-ffa450edef68