D9318: [knewstuff] Limit request cache size

[David Faure]

dfaure accepted this revision.
This revision is now accepted and ready to land.

REPOSITORY
  R304 KNewStuff

REVISION DETAIL
  https://phabricator.kde.org/D9318

To: anthonyfieroni, leinir, #frameworks, dfaure
Cc: dfaure, broulik