We want to split the cache config between the app cache and the session
cache. In the app cache, the default one, we allow to configure a
prefix. By default this prefix is a fixed string so the cache will be
never revoked because it is changing but it allow every instance to
implement its own strategy like prefixing the keyx cache with a
timestamp.
To not impact session, the session cache is splitted in the settings.
Manuel Raynaud
52cd76eb93