You don’t need to specify the listen.m3u in the config file
Just use a slash /
<relay>
<server>tributary.rave.ac.uk</server>
<port>8150</port>
<mount>/</mount>
<local-mount>/rave.mp3</local-mount>
<relay-shoutcast-metadata>0</relay-shoutcast-metadata>
</relay>
<server>tributary.rave.ac.uk</server>
<port>8150</port>
<mount>/</mount>
<local-mount>/rave.mp3</local-mount>
<relay-shoutcast-metadata>0</relay-shoutcast-metadata>
</relay>