Following a discussion with @dmbaturin in #vyos, I'm to work on this puppy.

In that case, BatString can just be added as a dependency, I guess, and we can call upon that function to sort as needed? Or would you still like a specific function for node sorting?

Depending on your feelings toward batteries, we could either use BatString's numeric_compare or just crib the implementation of that function (with all due credit given, of course).

I like this kind of problem.

@dmbaturin, you can probably assign this one to me, if you feel comfortable doing so. I think I'm nearly done. I'd just like to put together some decent test cases before making a PR.