3.0.0 RC

Hi,
Previouly, most of the parameters were stored in the parameters.php file, and new parameters added by each version were also written in the parameters.php file.
So application needs to be able to write this file.
There is a control on first configuration, but there is not control on migration to new version, so if you changed access rights to files, issue may occur. And you will find error only in the log file.

V3.0.0 completely refactors parameters storage. They are now moved to the database, except dababase access parameters and log files parameters.
So V3.0.0 needs to be able to write in parameters.php file (to remove parameters).
But now, new versions will not need this anymore. So you can reapply security access restrictions to your directories.