Tvheadend

Sorry, I know your first language isn't English but your post is rather confusing..

You talk about IP address changes then ask about mux files. I assume you mean you're manually changing mux files relating to an IPTV input source?

The config files are now compressed to make starting of Tvheadend faster.

You can still do what you want using a shell script, but instead of modifying files use the http (or htsp) api & make your changes that way. Look at how the webui interacts with the server when you edit a mux, in many cases it's just a simple http request, which you can make using something like CURL.