Feature request: Make source links in ui interface clickable

[Kamilcuk]

In the fabio routing table ui the source is not "clickable", but the destination is. Like https://starbeamrainbowlabs.com/blog/images/20200816-fabio.png .

It would be super nice if the source, if it redirects to http or https, would also be "clickable" and redirect to http or https respectively.

Thanks!

[nathanejohnson]

This is an interesting idea. In your png, I see all of your routes are using hostnames / fqdns to route. How would you envision path based routes working? Also, there is the issue of GRPC and TCP based routes as well, which would have to avoid linking, so there is some thinking to be done there. But a PR along these lines would be very welcome!

[nathanejohnson]

closing due to #907 being merged