SERVER-8046 Some additional mutable tests
SERVER-8046 Add an easy way to get an invalid element for a doc
SERVER-8046 Add a new hasChildren method is faster than counting
SERVER-2011 Added --quiet option to tools
migrate hash index to new index api SERVER-8791 SERVER-9164
SERVER-8536 reenable index builds for incomplete indexes at startup

At startup time, we will once again attempt to rebuild any index builds
that were in progress when the server was shut down.
This is to support background index builds with replication.
fix spaces at line start to keep linter happy
fix linux32 link