Configuration constants

Mainly newfounded constants (not common used0

e_PDO Enable PDO mode (used in PHP > 7 and when mysql_* methods are not available)
e_HTTP_STATIC define('e_HTTP_STATIC', ''); // Use a static subdomain for js/css/images etc.  - used on or here
X-FRAME-SAMEORIGIN define('X-FRAME-SAMEORIGIN', false);  Option to override X-Frame-Options - used f.e. you want to create mockup of site in online tools
e_DEBUG_JQUERY define('e_DEBUG_JQUERY', 2); - using JQuery 2
e_DEBUG_JS_FOOTER define('e_DEBUG_JS_FOOTER', true); - loading JQuery in footer