Tweak deprecation warning, and apply it to --limit also

Also prints a deprecated warning if a bare variable is detected, so
that we can remove this in a future version.

Fixes #11912

The correct (and now only) way to say p1 OR p2 is "p1:p2".

This function takes a string like 'foo:bar[1:2]:baz[x:y]-quux' and
returns a list of patterns ['foo', 'bar[1:2]', 'baz[x:y]-quux'], i.e.
splits the string on colons that are not part of a range specification.

get_hosts → used externally, not changed
_get_hosts → _evaluate_patterns (takes a list, evaluates ! and &)
__get_hosts → _match_one_pattern (takes one pattern only, ignores !&)

The correct (and now only) way to say p1 OR p2 is "p1:p2".

This function takes a string like 'foo:bar[1:2]:baz[x:y]-quux' and
returns a list of patterns ['foo', 'bar[1:2]', 'baz[x:y]-quux'], i.e.
splits the string on colons that are not part of a range specification.

This was used earlier to implement serial, but that's now done using
restrict_to_hosts() (whose docstring is also suitably adjusted here)
and there are no more callers.

Fix typo on AWS guide page

Fixes #11955

I assume this should read “Ansible modules” rather than “Ansible
ensiles”

Update README.md for legacy v1

Correct formatting of bullet points

Add shelvefile lookup plugin

Meta inventory and fixes

AIX unprivileged facts collection

add win_basename and win_dirname filters

fixes #11943

fixes #11945

cloudstack: refactor get_result()

Fixes #11895

* A commen dict of keys has been defined, which we look in results returned from the API.
* self.returns dict can be use in subclass to extend this dict.
* Optionally the key name can be replaced with a new key name, often used to make the return keys identical to the arguments passed.
* Use new style class

Fixes #11893