How to make a persistent change to squid.conf

[kd.gundermann]

It's documented here:
https://docs.opnsense.org/development/backend/templates.html#target-overwrites

I have read this docs now three times and still don't understand how this will help me to add additional configuration lines to squid.conf

If someone has used the templates to change squid.conf and share his knowledge I would be happy to create a Pull Request (PR) for the docs.

@franco : Or is there any other site / wiki where we can share/find such HowTo's  ??

Hint #1 found in https://forum.opnsense.org/index.php?topic=5892.msg24457#msg24457