Misleading url component name

[smaant]

wrap-url middleware parses a given URL and replaces it with components, produced by parse-url function. One of the components is :uri, which is based on implementation contains URL's path and this is very misleading. According to RFC 2396 and general convention in the industry, URI is a whole identifier, not just the part of it.

Also, I think it's worth it to keep original URL (or its encoded version) in the request map for further middlewares and handlers.

[dakrone]

Yes, I agree this should be changed to reflect what it actually is. We can do this in master (4.x) now since it's a breaking change

[cjbarre]

Hey @dakrone I'd like to adopt this one. My PR is attached. I'll handle any feedback from you.