Revert "config.php changed. Now we have a better debug mode that logs all errors to syslog. In production mode, we just log the erros but don't show it for the users. Timezone is now a value of the config array. The user can choose error reporting level and if the errors will be logged."

This reverts commit 67e5edd245a2f99b8c46aa9eb67df609bfb34371.