* Keep custom dnscrypt-proxy conffile when upgrading
* Unattended upgrade tuning
- Upgrade the 50unattended-upgrades file with latest options
- Keep the common unattended upgrade options in one file
- Enable removing of unused kernels and dependencies to save some space
* generate service IPs dynamically
* update cloud-init tests
* exclude ipsec and wireguard ranges from the random service ip
* Update docs
* @davidemyers: update wireguard docs for linux
* Move to netaddr filter
* AllowedIPs fix
* WireGuard IPs fix
<!--- Provide a general summary of your changes in the Title above -->
## Description
Renames the vpn role to strongswan, and split up the variables to support 2 separate VPNs. Closes#1330 and closes#1162
Configures Ansible to use python3 on the server side. Closes#1024
Removes unneeded playbooks, reorganises a lot of variables
Reorganises the `config` folder. Closes#1330
<details><summary>Here is how the config directory looks like now</summary>
<p>
```
configs/X.X.X.X/
|-- ipsec
| |-- apple
| | |-- desktop.mobileconfig
| | |-- laptop.mobileconfig
| | `-- phone.mobileconfig
| |-- manual
| | |-- cacert.pem
| | |-- desktop.p12
| | |-- desktop.ssh.pem
| | |-- ipsec_desktop.conf
| | |-- ipsec_desktop.secrets
| | |-- ipsec_laptop.conf
| | |-- ipsec_laptop.secrets
| | |-- ipsec_phone.conf
| | |-- ipsec_phone.secrets
| | |-- laptop.p12
| | |-- laptop.ssh.pem
| | |-- phone.p12
| | `-- phone.ssh.pem
| `-- windows
| |-- desktop.ps1
| |-- laptop.ps1
| `-- phone.ps1
|-- ssh-tunnel
| |-- desktop.pem
| |-- desktop.pub
| |-- laptop.pem
| |-- laptop.pub
| |-- phone.pem
| |-- phone.pub
| `-- ssh_config
`-- wireguard
|-- desktop.conf
|-- desktop.png
|-- laptop.conf
|-- laptop.png
|-- phone.conf
`-- phone.png
```
</p>
</details>
## Motivation and Context
This refactoring is focused to aim to the 1.0 release
## How Has This Been Tested?
Deployed to several cloud providers with various options enabled and disabled
## Types of changes
<!--- What types of changes does your code introduce? Put an `x` in all the boxes that apply: -->
- [x] Refactoring
## Checklist:
<!--- Go over all the following points, and put an `x` in all the boxes that apply. -->
<!--- If you're unsure about any of these, don't hesitate to ask. We're here to help! -->
- [x] I have read the **CONTRIBUTING** document.
- [x] My code follows the code style of this project.
- [x] My change requires a change to the documentation.
- [x] I have updated the documentation accordingly.
- [x] All new and existing tests passed.
* Move to ansible-2.4.3
* Add Lightsail support #623
* Fixing the EC2 deployment
* Scaleway integration #623
* OpenStack cloud provider (DreamCompute optimised) #623
* Remove the security role
* Enable unattended-upgrades for clouds
* New requirements to make Azure and GCE work
