Clean support of symbolic links in directories-as-playlists

[mrpingouin]

If given a directory as a playlist, liquidsoap recursively lists all files belonging to that directory and its subdirectories. It follows links. But it does not detect cycles, only avoiding loops by bounding the depth. This can be easily seen from funny observations:

2009/06/15 22:32:47 [decoder:3] Decoder MP3 chosen for "/tmp/loop/a/loop/a/loop/a/loop/a/loop/a/loop/a/loop/a/loop/a/loop/a/loop/a/loop/a/loop/a/loop/a/loop/a/loop/a/loop/a/loop/a/loop/a/loop/a/loop/a/loop/a/loop/a/loop/a/loop/a/loop/a/loop/a/loop/a/loop/a/loop/jingle/ecky.mp3".

Although this is not urgent, a cleaner support would be nice.

[wiki]

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