close[t:4334] merging 4334 to main. bulk fetch now grabs rows at an exponentialy rate with respect to the bulk fetch iteration, so range queries now fetch at most a factor of 2 more than they should. refs 4334


git-svn-id: file:///svn/mysql/tokudb-engine/tokudb-engine@39130 c7de825b-a66e-492c-adef-691d508d4ae1