Addresses #652, #2170, #2178 refs[t:652,2170,2178] Merge from 3.0.0-logging branch with command: svn merge -r15784:HEAD https://svn.tokutek.com/tokudb/mysql.branches/3.0.0-logging/tokudb .

git-svn-id: file:///svn/toku/tokudb@15839 c7de825b-a66e-492c-adef-691d508d4ae1