putenv('TTRSS_ENABLE_REGISTRATION=false');
        // Allow users to register themselves. Please be vary that allowing
        // random people to access your tt-rss installation is a security risk
        // and potentially might lead to data loss or server exploit. Disabled
        // by default.

        putenv('TTRSS_REG_NOTIFY_ADDRESS=admin@{$DomainName}');
        // Email address to send new user notifications to.

        putenv('TTRSS_REG_MAX_USERS=0');
        // Maximum amount of users which will be allowed to register on this
        // system. 0 - no limit.