Issue #2200841: Delete filecache bin before first use. Delete filecache bin registry when filecache is disabled.

Gonzalo Torrevejano authored Jul 19, 2015 and Ognyan Kulev committed Jul 19, 2015

Issue #1643548 by interdruper: Notice: Trying to get property of non-object in DrupalFileCache->delete_flushed()

Issue #1337084 by ogi: Allow default directory in non-Apache environment (e.g. Drush) if directory already exists.

Issue #1473322 by ogi: Fixed (hopefully) error messages due to strict access mode for newly created files and directories.

Issue 1177854 by misterpronin: Whether It is necessary to disconnect standard caching drupal by file cache unit operation? - added documentation

Implementation of expiration logic that matches DrupalDatabaseCache. Renamed *.cids to *.meta with new format that allows faster deletion of expired cache entries.