[Icecast] Having an intro play for a fallback stream

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Hello again evveryone.

  I was wondering if anyone knew of a way to force Icecast to play the
intro of a fallback stream? For example, if a live stream is active,
then disconnects, people are routed back to a fallback stream, but it
doesn't play the introduction I have set for that stream. It only
plays if someone starts to listen and they start with the fallback
stream.
  Thanks