* Add docker.sh and docker_metric.sh for collecting docker events/metrics
* Add helper script to extra/ to run the TA commands on systems without
a Splunk forwarder. The commands can be sent to a syslog server.
This script is useful for systems with small or read-only filesystems that
cannot support a Universal Forwarder.
* Add syslog_inputs_nix_ta app to extra/ for ingesting the data from syslog
