Icecast/Broadcastify Feed Should Attempt Reconnect On Mountpoint In Use

[DSheirer]

Version 0.5.0 final included an update that detects when the Icecast V1 or Broadcastify Feed server reports that the mountpoint is already in use. Previously, this was mis-identified as a general connection error and this allowed the stream to attempt a reconnect at each reconnect interval. With the update, a mountpoint in use error is a terminal error and the stream will not attempt a reconnect.

Update the logic so that the stream attempts a reconnect after encountering a mountpoint in use response from the server.

The downside to this change is that when a streaming mount point is truly in use by another streamer, sdrtrunk will repeatedly attempt to connect to that server every 30 seconds, but will report the error on each connection attempt.