21.1 URLs
| (require unstable/net/url) | 
This library is unstable; compatibility will not be maintained. See Unstable for more information.
| (url-replace-path proc u) → url? | 
| proc : ((listof path/param?) . -> . (listof path/param?)) | 
| u : url? | 
Replaces the URL path of u with proc of the former path.
| (url-path->string url-path) → string? | 
| url-path : (listof path/param?) | 
Formats url-path as a string with "/" as a delimiter
and no params.