Changes since v6.4.0:
- Fallback to which when "command -v" fails
- Use realpath by default to resolve symlinks instead of "readlink -f"
- ansible: Support environment variables
- Force package module to resolve to RpmPackage on Fedora
- Fix new versions of supervisor may exit with status != 0
- Eventually decode ansible output when it's not ascii
- Either use python3 or python to get remote encoding