Append log messages to a file. This basic version has no rollover support, so it just keeps on adding to the file.
Base class for file appenders
Tango Dual License: 3-Clause BSD License / Academic Free License v3.0. See LICENSE_TANGO.txt for details.
Copyright (c) 2004 Kris Bell. Some parts copyright (c) 2009-2016 dunnhumby Germany GmbH. All rights reserved.
Initial release: May 2004