SERVER-10471 for multikey indices only assign one pred to each field
SERVER-10471 hint can be key pattern or name
SERVER-10471 set a limit when a limit is requested
SERVER-10471 remove bad selectivity guess
SERVER-10471 fix intervals generated for minkey/maxkey lt(e) gt(e), modify spigot
SERVER-10471 fix bounds checker bug
SERVER-10471 migrate plan cache tests to tmp directory during migration
SERVER-10471 route 2d geonear queries to old system
SERVER-10471 some commenting