Revert "undo changes, didn't work"

This reverts commit 79fd4d40b73b784b995235ea6bae17cf348e86ca.
Revert "Update with new cache settings"

This reverts commit e7cbf3ee353d5dbfe43e26e4e0327e5602ce8af5.

Please revert commits rather than adding comments, git history reveals all
cache: add wp-cache-config file with path to cache

This is really _really_ ugly, but this plugin (for whatever reason) keeps all
settings in config files rather than in the database. Settings will become
stale here if tweaked in the admin console, so we'll have to sync this every
now and then.