nodes_shutdown(): The _shutdown API has been removed. Instead,
setup Elasticsearch to run as a service (see Running as a Service on Linux
Running as a Service on Windows
or use the -p command line option to write the PID to a file.
index_status(): _status route for the index API has been removed.
Replaced with the Indices Stats and Indices Recovery APIs.
mapping_delete(): Elasticsearch dropped this route in their API. Instead
of deleting a mapping, delete the index and recreate with a new mapping.