Fix help message

configuration.ini

@@ -45,6 +45,6 @@ help = Command available:
        <br />!play_radio <url> - url of a stream
        <br />!next - jump to the next music of the playlist
        <br />!stop - stop and clear the playlist
-       <br />!play_file - stop + Go to default channel
+       <br />!oust - stop + Go to default channel
        <br />!v - get or change the volume (in %)
        <br />!joinme