SERVER-11665: fix getLastError reporting of some errors
SERVER-11647 fix potential seg fault in syncSourceFeedback
SERVER-10026 split getRunner out from the .find() execution
SERVER-10026 add maxScan support for new query
SERVER-10026 remove impls of commands that used old query sys
SERVER-10026 support showDiskLoc in new sys
SERVER-10026 support max/min in new sys