liri,
I am not aware of any config parsing modules that uses whitespace to denote sections but that's because I always use Config::IniFiles. There is however a large suite of modules in the Config:: family - have you looked yourself yet?
Yeah I started looking on cpan for some but you're more than right there is more than a handful, and not all of them mention how they work so it's a bit hard to know which module is right out of all the results.
Thanks, I will check the IniConfig module.