Checkmk Werk 7422: apt: add information about cache invalidation to the manual page

ID: 7422 Title: apt: add information about cache invalidation to the manual page Component: Checks & agents Level: 1 Class: New feature Version: 1.7.0i1 The manual page now describes how the check can be executed immediately after an update of a host. Furthermore an apt hook is provided in the treasures directory.