Rubber-stamped by Holger Freyther.

        Reduce hard-coded page-cache count to 3 based on research done for the
        Mac port on value / page.

        We will need to make this more dynamic or configurable at some point
        but for now it's best to keep closer to the behaviour before page
        caching was enabled.

        Issue spotted by Mark Rowe.

        * webkit/webkitprivate.cpp:
        (webkit_init):


git-svn-id: http://svn.webkit.org/repository/webkit/trunk@32014 268f45cc-cd09-0410-ab3c-d52691b4dbfc