Currently if a user does not replace the .htaccess file with the new update this can lead to serious problems in case Apache is used as webserver.
This commit adds the version to the .htaccess file and the update routine fails in case not the newest version is specified in there. This obviously means that every release has to update the version specified in .htaccess as well. But I see no better solution for it.
Conflicts:
lib/private/updater.php
This commit will make the supported DBs for installation configurable within config.php. By default the following databases are tested: "sqlite", "mysql", "pgsql". The reason behind this is that there might be instances where we want to prevent SQLite to be used by mistake.
To test this play around with the new configuration parameter "supportedDatabases".
