Second pull request ready for review

[Gerhard R.]

The merge to master of my first pull request was a bit premature. A
second one is ready for review:

  https://github.com/parrot/parrot/pull/944
  https://github.com/gerdr/parrot/blob/243bad2ffdf773bd1bc9cfa1fa6b5a8fef235f65/src/io/utilities.c#L395

I still need to add test cases for the things I mentioned here:

  https://github.com/parrot/parrot/pull/943#issuecomment-14763687

--gerdr