Is your feature request related to a problem? Please describe.

In some cases, a URL may need to be updated dynamically, for example based on user location, and the port of the URL also needs to be adjusted.

At the moment, the request.subgraph.uri.* setters only allow setting the hostname or the path.

Describe the solution you'd like

The ability to set the port via something like request.subgraph.uri.port.

Describe alternatives you've considered

Coprocessors can do this today, however Rhai may be a good fit for other organizations.