Fetch a value for a given parameter name (from a provisioning snippet) on a subnet
It would be nice to add parameters to subnets in Foreman, and use those parameters to perform certain operations.
I have a concrete case where I want to put every subnet in a given firewall zone (public, internal, dmz, etc.). This means in practice the addition of a
ZONE=public line in the
ifcfg-file (on RedHat), and firewalld picks it up automatically.
fixes #19977 - Fetch a value for a given subnet parameter name
This code will add a function to lookup a subnet parameter by name,
and returns it's value. It will return `nil` if no value was found.
The function is added to the renderer, so it can be called from