Adding auto-purge routine for XML sitemaps.
See: websharks/quick-cache#169
Should call preg_split() first (bug fix).
See: websharks/quick-cache#169
Multisite compat.
See: websharks/quick-cache#169
Action hook for auto-cache engine CRON alternative.
See: websharks/quick-cache#169
Merge branch 'feature/130-151-169' into feature/213