Typo fix from `accelerated: true` to `accelerate: true`

Merge branch 'fix/apt_repository_update_cache' of https://github.com/resmo/ansible into resmo-fix/apt_repository_update_cache

The default behavior is to update_cache if changed.

If you add more then one repo, you may not want to update cache for every repo separately.
So you can now disable update_cache with this new option e.g. update_cache=no

Updating cache can also be handled using the apt module.

Cosmetic - Digital ocean cleanup

The EXAMPLES block here has two copies of the same docs,
one nicely formatted, the other less so.

It looks like a pass was made to clean up the docs but the old
cruftier ones were never removed.

zabbix inventory: print errors to stderr

Two fixes:

* parameter name is selevel, not serange.
* Fix split on selinux context to limit to max of 4 since the selevel
  may contain ':' characters.  This was fixed in
  selinux_default_context() and selinux_context().

apt: fixed duplicate fail_json

Fixed monit restarted error.

Errors everytime...

Conflicts:
	lib/ansible/playbook/play.py

Previously, includes had to receive variables via a special 'vars'
field. With this patch, the include syntax becomes a more natural
datastructure without special fields and is more akin to the way
role includes/dependencies work.

Tested with the following playbook:
---
- hosts: localhost
  connection: local
  tasks:
  - { include: inc1.yml, a: 1 }
  - include: inc2.yml
    b: 2
  - include: inc3.yml
    with_items:
    - x
    - y
    - z

Fixes #3481

Fixes #4129

Merge branch 'subelements' of https://github.com/sergevanginderachter/ansible into sergevanginderachter-subelements

Conflicts:
	lib/ansible/runner/connection_plugins/accelerate.py

Fixes #4111

- use egrep patterns to detect BSDs in one ifeq
- use seconds-since-epoch as input for BSD date (-r option)
- get seconds-since-epoch from git log with "%at" format string

Add some more OpenBSD facts