1. Bug #0000159: Prevent of Execution of System Files of files other, then "index.php" and "admin/index.php" 2. Adding DEFINED FULL_PATH security-check
1. Fixes #0000218: Error reporting in configuration sections is broken. 2. Implemented fully-featured configuration value validation during saving (just put serialized field option array into "Validation" field in ConfigurationAdmin table for given variable). Even "required" check works. Test on "SessionTimeout" variable.