* Improved the forking machine for the file input. In the past for each
  single file a process was forked if the parameter "workers" was set.
  Now only one process is forked to process all files from a single
  input configuration. The forked process is also watching for new
  log files. For file inputs max 1 worker is possible.
* Added the new parameter "start_position" to Input/File.pm. With this
  parameter it's possible to set where to start to tail the logfile.
  Possible values are "begin" and "end". The file watcher of awesant
  sets this parameter to "begin" if a new file were found.