Support both param and query syntax

[rhukster]

just a todo so it's not forgotten

[fredrikekelund]

The back-end already supports both syntaxes explicitly, right? Would you be alright with me submitting a PR to make sure the docs mention this?

I can see how some people would prefer the cleaner syntax, but with query parameters being the standard way to pass form data with GET requests, it'd be nice to know that there's an option to use that as well!