by setting the `ANSIBLE_NULL_REPRESENTATION` environment variable.
* Added `meta: refresh_inventory` to force rereading the inventory in a play.
This re-executes inventory scripts, but does not force them to ignore any cache they might use.
* Now when you delegate an action that returns ansible_facts, these facts will be applied to the delegated host, unlike before when they were applied to the current host.
* New delegate_facts directive, a boolean that allows you to apply facts to the delegated host (true/yes) instead of the inventory_hostname (no/false) which is the default and previous behaviour.
* local connections now work with 'su' as a privilege escalation method
* New ssh configuration variables(`ansible_ssh_common_args`, `ansible_ssh_extra_args`) can be used to configure a
per-group or per-host ssh ProxyCommand or set any other ssh options.