Change old recommendation about insecure variables (#18493)
Change old recommendation about insecure variables (#18493)

* Change old recommendation about insecure variables

These warnings were relevant before ansible had the secure vault feature:
any secret put into a variable used to be a bad idea.

With the vault feature (available since ansible 1.5) it's no longer a bad
idea to use these variables, as long as they aren't stored in plain text.

* Update intro_inventory.rst

Minor edit

thaim/ansible,thaim/ansible