Allows hosts to use vars in `group_vars/sovereign`

Name a module after the software it provides, not the functionality it
provides.  This allows alternative software providing the same
functionality to be located in Sovereign.

Remove unnecessary ownCloud configuration

Add non-interactive to LE client options

Remove unneeded/deprecated apache configuration

Fixed LE renew options

Fix fail2ban dovecot config.

add www.domain DNS entry to README.md

The ownCloud configuration file does not get touched.  The virtual host
configuration is modified by sovereign but can be updated in place and
Apache restarted.

Add leading 0 to octal file permissions

This is done to suppress warnings from ansible-lint.

Depending on when the client is run, there are no certificates to
update.  By default, the client runs in interactive mode and wants to
notify the user of this.  This causes Ansible to hang waiting for an
acknowledgement that will never come.  Adding the non-interactive flag
fixes this.

Idempotency fixes to LetsEncrypt handling.

Encrypt Postgres passwords, and fix change-reporting.

Add directories to allow persistent znc user/modules configuration.

Fix monitoring config for apache/postgresql.

Idempotency/changed-reporting fixes for OpenDMARC tasks.

Workaround bug with enabling SysV init scripts on Jessie.

Update versions in README

Use https for rpsamd key and repository

Only add iptables rules if they don't already exist

Complete rmilter/rspamd setup.

Remove unused variables in jessie

- google_auth_version
- znc_version

bash syntax cleanup