Changed config to tobbenb/tvheadend path. This way there should be no problem moving to the linuxserver version. Should have done this from the start!
@@ -1,3 +1,3 @@
#!/usr/bin/with-contenv bash
exec \
- s6-setuidgid abc /usr/bin/tvheadend -C
+ s6-setuidgid abc /usr/bin/tvheadend -C -c /config