- Add the ability to return stdout and stderr through an array of strings or
  an array of bytes (stdout only).
- The signal name is now formed by concatenating the string specified in
  the backend file and the sender. Dots and colons in the sender are replaced
  with underscores. If the signal name in the backend file is not specified,
  then the signals are disabled.
- Add the ability to limit stdout and stderr arrays in bytes (Default 524288).
- Add the ability to disable the return of stdout and stderr arrays using
  special options in the backend file.