Fixes #9758

Add missing connection and header

Docfix: checking a background task

Minor changes to wording on how to check a background task with async_status.

Fixes #9740

Docfix: running background tasks without polling

typofixes - https://github.com/vlajos/misspell_fixer

Disable automatic running of test_delegate_to with an explanation of what it would take to set this up in our automated test systems

Fix the example in the doc to explicitly set the poll interval to zero so the
job doesn't poll.

To run a background task without polling, you need to set the poll interval to
zero. However, Ansible's default poll setting is 15 seconds, so not specifying the poll
interval will cause a background job to poll.

Have known_hosts function use the url parameter instead of getting a specific attribute out of the module dict.

This makes the function useful in more places

fixed integration test as with_items 

empty

Listify revert errorhandling

This 'mostly' reverts commit 2769098f.

Conflicts:
	lib/ansible/utils/__init__.py
	test/units/TestUtils.py

Fixes #9704

Issue-9704 Better handling of missing python

When they python interpreter is set incorrectly for the machine the file
is being checked for (e.g. for the local or the remote), the error
manifests as a readability or directory missing error which can be very
misleading.

Remove unused if/else clause, since it doesn't change anything

Fixes #9663

Fixes #9699

Allow .gitkeep in the jsonfile fact cache dir