Use "url" module instead of "uri" module in http.js.

Use "url" module instead of "uri" module in http.js.

Deprecate the URI module and remove tests for it.
- Rename "uri" to "url".
- Use the "url" module instead of the "uri" module.
- Remove the url parsing from http.js
- Update http.cat with the changed field names.
- Update tests for changes to http.js
- Update documentation for changes in http.js