Adding parameter PermissionCacheTimeout that determines the lifetime of the permissions cache. Adding comment to PermissionCacheP parameter saying server must be restarted after change. Removing instantiation of acs-kernel in acs-install.sql (not needed as its done in apm_install_package).
Added a proc ad_http_cache_control that outputs No-Cache headers by default for all dynamic pages, and a kernel parameter to turn it off. Fixes bug #186.