Fix typo requird -> required

Add notes to rax_dns and rax_dns_record to recommend using serial: 1

Update django_manage `command` argument description

Don't use listify_ function, when all we want to do is template variable...

The docs were a little bit out of date with what commands are available to be run. They also didn't explain that you could pass custom commands - I almost went down the path of trying to run our custom management commands with the generic Ansible `command` module.

Fixes #7403

EC2: stopped instances can also be terminated

Merge branch 'multi-word-mysql-grant-example' of https://github.com/webmat/ansible into webmat-multi-word-mysql-grant-example

now module searches for update-alternatives vs hardcoding it

Since the filter list contains hosts, passing that back to list_hosts()
in the inventoy causes issues when the hostname is an IPv6 address
(with :'s interpreted as group unions). Since we already have the list
of hosts, we should not need to pass that back through inventory a
second time.

Fixes #7446

This was causing a bug in the env module, due to the fact that we now
pass variables for the module through the templating engine combined
with the fact that we split-up the hostvars and setup variables. As a
result, if a variable in the env lookup had the same name as the variable
in Ansible, it would try and template itself over and over again until
the recursion limit would be hit, at which time an empty string was
returned.

Fixes #7396

Fix skip dir inventory extensions

Also added some error handling to the fetch_url() call in the
apt_repository module, so that failures to look up the PPA info
are properly handled.

Fixes #7322

The ssl cert check will now respect the http and https proxy
environment settings. The url may also have the username/password
embedded, in which case basic auth will be used to connect to the
proxy server.

Fixes #7413

Fixes #7448

Add missing space between var and delimeter

Fixes #7414

Fixes #7416

Update composer example

Remove unsupported 'install' argument

docker: fix targetting images by name