offer API to create own File log. admin_audit makes use of it

apps/admin_audit/lib/AppInfo/Application.php

.../tests/unit/Connector/Sabre/ExceptionLoggerPluginTest.php

lib/composer/composer/autoload_classmap.php

lib/composer/composer/autoload_static.php

lib/private/Log.php

lib/private/Log/Errorlog.php

lib/private/Log/File.php

lib/private/Log/LogFactory.php

lib/private/Log/Syslog.php

lib/private/Server.php

lib/public/IServerContainer.php

lib/public/Log/ILogFactory.php

lib/public/Log/IWriter.php

tests/lib/Log/FileTest.php

tests/lib/LoggerTest.php