In install.php staat een overzichtje op regels 1511-1518 met extra defines voor in e107_config.php (thx Tgtje!)

// -- Optional --
// define('e_DEBUG', true); // Enable debug mode to allow displaying of errors
// define('e_HTTP_STATIC', 'https://static.mydomain.com/'); // Use a static subdomain for js/css/images etc.
// define('e_MOD_REWRITE_STATIC', true); // Rewrite static image urls.
// define('e_LOG_CRITICAL', true); // log critical errors but do not display them to user.
// define('e_GIT', 'path-to-git'); // Path to GIT for developers
// define('X-FRAME-SAMEORIGIN', false); // Option to override X-Frame-Options
// define('e_PDO, true); // Enable PDO mode (used in PHP > 7 and when mysql_* methods are not available)

Soms is het handig om deze te weten!