Correct typo in variable in docs.
We have had only_if, when_foo, etc, deprecated for a while and said they would be removed in 1.5.  Now they are, with friendly error messages still.

Users of these features should use "when:" as documented at docs.ansible.com.

Similarly, include + with_items has been removed.  The solution is to loop
inside the task files, see with_nested / with_together, etc.