Change localhost in m3u files!

Hello,

when Streaming from my Server the m3u file contains this:

#EXTM3U
#EXTINF:-1,Kopfüber in die Nacht

The problem is, localhost needs to be replaced with my actual servername when tvheadend generates the m3u files.
Else it wont play.

How can i do this?

KR,
Dirk
<<

when connecting to the web interface, use the server name or ip address instead of localhost...

Thats what i did. Still getting "localhost".