This commit will:
1. Change the user account database from sqlite to OpenLDAP
2. Add policyd-spf to postfix for SPF validation
3. Add a test runner with some automated test suites
Notes:
User account password hashes are preserved.
There is a new Roundcube contact list called "Directory" that lists the users in LDAP (MiaB users), similar to what Google Suite does.
Users can still change their password in Roundcube.
OpenLDAP is configured with TLS, but all remote access is blocked by firewall rules. Manual changes are required to open it for remote access (eg. "ufw allow proto tcp from <HOST> to any port ldaps").
The test runner is started by executing tests/runner.sh. Be aware that it will make changes to your system, including adding new users, domains, mailboxes, start/stop services, etc. It is highly unadvised to run it on a production system!
The LDAP schema that supports mail delivery with postfix and dovecot is located in conf/postfix.schema. This file is copied verbatim from the LdapAdmin project (GPL, ldapadmin.org). Instead of including the file in git, it could be referenced by URL and downloaded by the setup script if GPL is an issue or apply for a PEN from IANA.
Mangement console and other services should not appear or behave any differently than before.
[this is a squashed merge from-]
* Install owncoud 9.1 and provide an upgrade path from 8.2. This also disables memcached and goes with apc. The upgrade fails with memcached.
* Remove php apc setting
* Add dav migrations for each user
* Add some comments to the code
* When upgrading owncloud from 8.2.3 to 9.1.0 the backup of 8.2.3 was overwritten when going from 9.0 to 9.1
* Add upgrade path from 8.1.1. Only do an upgrade check if owncloud was previously installed.
* Stop php5-fpm before owncloud upgrade to prevent database locks
* Fix fail2ban tests for owncloud 9
* When upgrading owncloud copy the database to the user-data/owncloud-backup directory
* Remove not need unzip directives during owncloud extraction. Directory is removed beforehand so a normal extraction is fine
* Improve backup of owncloud installation and provide a post installation restore script. Update the owncloud version number to 9.1.1. Update the calendar and contacts apps to the latest versions
* Separate the ownCloud upgrades visually in the console output.
