SERVER-10060 check uniqueness of _id before migration upserts
SERVER-9365 make forced halfway split work with chunks with many docs
SERVER-9072 remove bad timed_wait code from Notification
SERVER-1891 Fix SSL builds.
SERVER-10162 Visual Studio -- add db/ops/log_builder.{cpp,h}
SERVER-1891 Add audit logging hooks for authorization checks in mongos.
SERVER-6405 SERVER-10256 - unify extent quantization code to avoid looping