[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.
On some machines localhost is defined as something other than 127.0.0.1, and if we mix "127.0.0.1" and "localhost" then some connections won't be to to the address a service is actually running on.
This was the case with DKIM: It was running on "localhost" but Postfix was connecting to it at 127.0.0.1. (https://discourse.mailinabox.email/t/opendkim-is-not-running-port-8891/1188/12.)
I suppose "localhost" could be an alias to an IPv6 address? We don't really want local services binding on IPv6, so use "127.0.0.1" to be explicit and don't use "localhost" to be sure we get an IPv4 address.
Fixes#797
Seems like ownCloud 8.1.1 now doesn't play nice with trusted_domains. Whatever is put in ahead of time gets reset to an array containing 'localhost' only, probably because we invoke autoconfiguration from the command line where it doesn't know the hostname it's being accessed from. We now set this value after running autoconfig.
This has the added benefit of also fixing the problem that if PRIMARY_HOSTNAME changes, trusted_domains wasn't updated. Now it is. Fixes#503.
See #514.
Contacts and Calendar are now versioned separately from ownCloud core.
Contacts appears to be in a v0.4.x.x series. This is the hash of v0.4.0.0.
Per https://github.com/owncloud/calendar/issues/892, Calendar is in a 0.7.x series. This is the hash for 0.7.2.
If the downloaded file doesn't pass hash verification, the script exits and leaves a broken system
Just make hash verification before moving owncloud directory
this will always download the latest ownCloud and upgrade if ownCloud install dir exist, this apphroach allows us to keep existing user plugins. currently not checking if currently installed version is equal to the one we're downloading as I couldn't find a proper solution for that
