[t:2947] Merge from tokudb.2947.  Added errno to error log, don't take minicron lock for engine status.  I want to print engine status to error log, but the env isn't available everywhere, so that's not here (yet).

git-svn-id: file:///svn/toku/tokudb@24075 c7de825b-a66e-492c-adef-691d508d4ae1