3 hooks: handler, page_final
5 decription: keeps a cache of already rendered pages
9 EWIKI_CACHE_FULL=1|0 // include control-links line in cache
10 EWIKI_CACHE_ALL=0|1 // cache also virtual pages
11 EWIKI_CACHE_DIR=./var/cache // preferred over db storage
12 EWIKI_CACHE_DB=system/cache/ // only has effect, if _DIR undefined
13 description: caching of rendered (html) pages