Commented Unassigned: uri_builder::to_uri() does not include user info [329]

User info provided via ```uri_builder::set_userinfo()``` is not used by ```uri_components::join()```, and thus does not appear in the return value of either ```uri_builder::to_uri()``` or ```uri_builder::to_string()```.

-evan
Comments: Hi Evan, Yes you are absolutely right. This is a surprising and slightly embarrassing bug. I guess no one indeed does really use the user information component much at all. I have a fix that I'm preparing now. Steve