* 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
Filter out multiple listing of the same btrfs volume
Use mktemp for temp files (for times when the TA may be run outside of Splunk)
If running rlog.sh outside of Splunk, use $HOME to store seek file
Debian also uses apt
Arch Linux uses pacman
Add use of sudo -n for 'apt update' and 'pacman -Syy'
vmstat uses "K paged out"
Replace the use of 'sar' with netstat and vm_stat for MacOS
