Unfortunately, I haven't looked at the RFC compliance side of things in
this space in years. At the time, we were considering a new module, leaving
the old one alone.

These days, I'd be more inclined to just fix it for 3.5, and suggest anyone
really needing the old behaviour fork an older version of the module.

Extracting the test case inputs from that old "uriparse" rewrite might
still be a good idea, though.