Issue #3469662: Document the usage of $conf[cache_prefix] and $conf[apc_cache_prefix]
(cherry picked from commit 021ec04e)
f2f6eca8 Issue #3469662: Document the usage of $conf[cache_prefix] and $conf[apc_cache_prefix] b5acaab0 Used the correct name for the cache class; avoided to repeat "in the...
Co-authored-by: Alberto Paderno 22536-avpaderno@users.noreply.drupalcode.org