Tvheadend routing not working with package from upstream due to different address

Issue

We have a report on support that frontend for tvheadend link does not work properly

Probable cause

Having both locally (on our office computer) and on user's computer the same error in /var/log/lighttpd/error.log:

2023-03-15 08:44:13: (../src/server.c.1588) server started (lighttpd/1.4.67)
2023-03-15 11:56:37: (../src/server.c.2097) server stopped by UID = 0 PID = 1
2023-03-15 11:56:38: (../src/server.c.1588) server started (lighttpd/1.4.67)
2023-03-15 11:57:23: (../src/gw_backend.c.283) establishing connection failed: socket: tcp:127.0.0.1:9981: Connection refused
2023-03-15 11:57:23: (../src/gw_backend.c.993) all handlers for /tvheadend/? on  are down.
2023-03-15 11:57:25: (../src/gw_backend.c.360) gw-server re-enabled: tcp:127.0.0.1:9981 127.0.0.1 9981 

Task

• Investigate why handler for lighttpd fails
• Fix the issue

credit goes to

@mmatejek